OPINION
COHEN, Justice.
This is an appeal from a summary judgment construing oil, gas, and mineral leases.
Appellants own mineral interests in two tracts of land on which they executed eight leases that were assigned to appellee. Ap-pellee pooled the tracts into two separate gas units that include three producing gas wells. Each well produces sour gas, which is gas that contains hydrogen sulfide.
Appellee contracted with Cities Service Co. for delivery of sour gas at the wellhead. Cities Service would transport the sour gas to its processing facility, where sulphur was recovered from the hydrogen sulfide gas. Cities Service would keep 15-20% of the sulphur produced and return the remaining sulphur to appellee, which would sell it to third parties.
Appellee tendered to appellants one dollar per long ton of sulphur extracted from the gas, the royalty provided in the lease for sulphur. However, appellants refused the payments and sued, claiming that under the gas clause of the lease, they were entitled to recover a greater amount, namely, one-fourth of appellee’s net proceeds from the sales of sulphur recovered from the hydrogen sulfide gas.
Both parties contend that the leases are unambiguous, but they disagree on which royalty provision applies. The sole issue on appeal is which subsection applies, 3(b)(1) or 3(c). Appellants contend that they are entitled to royalties on hydrogen sulfide gas under subsection 3(b)(1), the gas clause, because hydrogen sulfide is a gas that was sold to Cities Service. Appel-lee contends that subsection 3(c), the sul-phur clause, applies because it was “sul-phur mined and marketed” that was sold to Cities Service and to third parties.
The disputed provision of each lease is identical. It refers to appellants as “lessor” and to appellee as “lessee” and provides:
3. As royalty, lessee covenants and agrees: ... (b) To pay lessor on gas and casinghead gas produced from said land (1) when sold by lessee, ¼ of the amount realized by lessee, computed at the mouth of the well, or (2) when used by lessee off said land or in the manufacture of gasoline or other products, the market value, at the mouth of the well, [291]*291of Vi of such gas and casinghead gas; (c) To pay lessor on all other minerals mined and marketed or utilized by lessee from said land, one-tenth either in kind or value at the well or mine at lessee’s election, except that on sulphur mined and marketed the royalty shall be one dollar ($1.00) per long ton. (Emphasis supplied.)
In construing the leases, this Court must seek the intention of the parties, as expressed in each lease. Ordinarily, the lease alone is deemed to express the parties’ intent. City of Pinehurst v. Spooner Addition Water Co., 432 S.W.2d 515 (Tex.1968). Their intent is found by considering all of the lease’s provisions and by harmonizing, if possible, those that conflict. If such a conflict or ambiguity makes the lease susceptible of two reasonable meanings, extrinsic evidence is admissible to resolve the conflict or ambiguity. McMahon v. Christmann, 157 Tex. 403, 303 S.W.2d 341 (1957). However, extrinsic evidence cannot be considered if the lease clearly discloses the parties’ intention, or if the lease is susceptible of only one legal meaning. Sun Oil Co. (Delaware) v. Madeley, 626 S.W.2d 726 (Tex.1981). Moreover, a mineral lease is to be strictly construed against the lessee and in favor of the lessor, the appellants. Clark v. Perez, 679 S.W.2d 710 (Tex.App.—San Antonio 1984, no writ); 3 H. Williams, Oil and Gas Law sec. 628 (1981).
Appellants maintain that hydrogen sulfide gas is not “sulphur” within the meaning of 3(c), and that only elemental sulphur, i.e., sulphur existing as an uncombined chemical element, is covered by that section. They argue that, under Exxon v. Middleton, 613 S.W.2d 240 (Tex.1981), the hydrogen sulfide gas is “sold” by appellee to Cities Service upon delivery “at the mouth of the well,” and that the price received is 80-85% of the elemental sulphur later recovered. They contend that this constitutes a sale, even though the consideration paid by Cities Service to appellee is sulphur rather than cash. Thus, they say . that they are entitled to ¼ of the value of the sulphur returned to appellee, pursuant to section 3(b)(1). See Tex.Bus. & Comm. Code Ann. arts. 2.106(a), 2.304(a) (Vernon 1968).
Appellee responds that hydrogen sulfide gas is a dangerous corrosive poison, a degrading impurity that has no value at the wellhead, except for the potential to extract sulphur from it, and that the lease’s references to sulphur show that the parties intended to treat sulphur differently from gas or other minerals by naming it specifically and repeatedly, throughout each lease. They argue that this intent is apparent from reading each lease as a whole, and therefore, that the specific sulphur royalty in subsection 3(c) controls over the general reference to “gas,” which would impliedly include hydrogen sulfide gas, within the “gas” royalties of section 3(b)(1).
The question of whether royalties on sul-phur extracted from sour gas should be paid under the gas clause or the sulphur clause has aroused controversy recently in the United States Court of Appeals for the Fifth Circuit. First National Bank v. Pursue Energy Corp., 784 F.2d 659 (5th Cir.1986) (“Pursue /”), vacated by, 799 F.2d 149 (5th Cir.1986) (“Pursue II”). Pursue.involved the same legal issue and construed a royalty provision identical to that in the instant case.
In Pursue, the federal district court had granted a summary judgment for the lessor and held that the lease unambiguously entitled the lessor to royalties under the gas clause for sulphur manufactured from sour gas. In Pursue I, the appellate court reversed that judgment and held that the lease was ambiguous. To show the ambiguity, the court set out arguments favoring royalty payments under either of the two clauses. 784 F.2d at 662-63. The court distinguished its prior decision in Scott Paper Co. v. Taslog, Inc., 638 F.2d 790 (5th Cir.1981), where it had affirmed a summary judgment for the lessor holding that royalties for sulphur produced from sour gas were to be paid under the gas clause. The court in Pursue I held that Taslog was not controlling because it differed in three significant ways: (1) the Taslog lease had no specific royalty provision for “sulphur”; [292]*292(2) the Taslog lease provided a royalty for gas that also included “other gaseous substance produced from the premises”; (3) the lessee in Taslog stipulated that industry practice supported payment for sulphur produced from sour gas under the gas clause, while in Pursue,
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OPINION
COHEN, Justice.
This is an appeal from a summary judgment construing oil, gas, and mineral leases.
Appellants own mineral interests in two tracts of land on which they executed eight leases that were assigned to appellee. Ap-pellee pooled the tracts into two separate gas units that include three producing gas wells. Each well produces sour gas, which is gas that contains hydrogen sulfide.
Appellee contracted with Cities Service Co. for delivery of sour gas at the wellhead. Cities Service would transport the sour gas to its processing facility, where sulphur was recovered from the hydrogen sulfide gas. Cities Service would keep 15-20% of the sulphur produced and return the remaining sulphur to appellee, which would sell it to third parties.
Appellee tendered to appellants one dollar per long ton of sulphur extracted from the gas, the royalty provided in the lease for sulphur. However, appellants refused the payments and sued, claiming that under the gas clause of the lease, they were entitled to recover a greater amount, namely, one-fourth of appellee’s net proceeds from the sales of sulphur recovered from the hydrogen sulfide gas.
Both parties contend that the leases are unambiguous, but they disagree on which royalty provision applies. The sole issue on appeal is which subsection applies, 3(b)(1) or 3(c). Appellants contend that they are entitled to royalties on hydrogen sulfide gas under subsection 3(b)(1), the gas clause, because hydrogen sulfide is a gas that was sold to Cities Service. Appel-lee contends that subsection 3(c), the sul-phur clause, applies because it was “sul-phur mined and marketed” that was sold to Cities Service and to third parties.
The disputed provision of each lease is identical. It refers to appellants as “lessor” and to appellee as “lessee” and provides:
3. As royalty, lessee covenants and agrees: ... (b) To pay lessor on gas and casinghead gas produced from said land (1) when sold by lessee, ¼ of the amount realized by lessee, computed at the mouth of the well, or (2) when used by lessee off said land or in the manufacture of gasoline or other products, the market value, at the mouth of the well, [291]*291of Vi of such gas and casinghead gas; (c) To pay lessor on all other minerals mined and marketed or utilized by lessee from said land, one-tenth either in kind or value at the well or mine at lessee’s election, except that on sulphur mined and marketed the royalty shall be one dollar ($1.00) per long ton. (Emphasis supplied.)
In construing the leases, this Court must seek the intention of the parties, as expressed in each lease. Ordinarily, the lease alone is deemed to express the parties’ intent. City of Pinehurst v. Spooner Addition Water Co., 432 S.W.2d 515 (Tex.1968). Their intent is found by considering all of the lease’s provisions and by harmonizing, if possible, those that conflict. If such a conflict or ambiguity makes the lease susceptible of two reasonable meanings, extrinsic evidence is admissible to resolve the conflict or ambiguity. McMahon v. Christmann, 157 Tex. 403, 303 S.W.2d 341 (1957). However, extrinsic evidence cannot be considered if the lease clearly discloses the parties’ intention, or if the lease is susceptible of only one legal meaning. Sun Oil Co. (Delaware) v. Madeley, 626 S.W.2d 726 (Tex.1981). Moreover, a mineral lease is to be strictly construed against the lessee and in favor of the lessor, the appellants. Clark v. Perez, 679 S.W.2d 710 (Tex.App.—San Antonio 1984, no writ); 3 H. Williams, Oil and Gas Law sec. 628 (1981).
Appellants maintain that hydrogen sulfide gas is not “sulphur” within the meaning of 3(c), and that only elemental sulphur, i.e., sulphur existing as an uncombined chemical element, is covered by that section. They argue that, under Exxon v. Middleton, 613 S.W.2d 240 (Tex.1981), the hydrogen sulfide gas is “sold” by appellee to Cities Service upon delivery “at the mouth of the well,” and that the price received is 80-85% of the elemental sulphur later recovered. They contend that this constitutes a sale, even though the consideration paid by Cities Service to appellee is sulphur rather than cash. Thus, they say . that they are entitled to ¼ of the value of the sulphur returned to appellee, pursuant to section 3(b)(1). See Tex.Bus. & Comm. Code Ann. arts. 2.106(a), 2.304(a) (Vernon 1968).
Appellee responds that hydrogen sulfide gas is a dangerous corrosive poison, a degrading impurity that has no value at the wellhead, except for the potential to extract sulphur from it, and that the lease’s references to sulphur show that the parties intended to treat sulphur differently from gas or other minerals by naming it specifically and repeatedly, throughout each lease. They argue that this intent is apparent from reading each lease as a whole, and therefore, that the specific sulphur royalty in subsection 3(c) controls over the general reference to “gas,” which would impliedly include hydrogen sulfide gas, within the “gas” royalties of section 3(b)(1).
The question of whether royalties on sul-phur extracted from sour gas should be paid under the gas clause or the sulphur clause has aroused controversy recently in the United States Court of Appeals for the Fifth Circuit. First National Bank v. Pursue Energy Corp., 784 F.2d 659 (5th Cir.1986) (“Pursue /”), vacated by, 799 F.2d 149 (5th Cir.1986) (“Pursue II”). Pursue.involved the same legal issue and construed a royalty provision identical to that in the instant case.
In Pursue, the federal district court had granted a summary judgment for the lessor and held that the lease unambiguously entitled the lessor to royalties under the gas clause for sulphur manufactured from sour gas. In Pursue I, the appellate court reversed that judgment and held that the lease was ambiguous. To show the ambiguity, the court set out arguments favoring royalty payments under either of the two clauses. 784 F.2d at 662-63. The court distinguished its prior decision in Scott Paper Co. v. Taslog, Inc., 638 F.2d 790 (5th Cir.1981), where it had affirmed a summary judgment for the lessor holding that royalties for sulphur produced from sour gas were to be paid under the gas clause. The court in Pursue I held that Taslog was not controlling because it differed in three significant ways: (1) the Taslog lease had no specific royalty provision for “sulphur”; [292]*292(2) the Taslog lease provided a royalty for gas that also included “other gaseous substance produced from the premises”; (3) the lessee in Taslog stipulated that industry practice supported payment for sulphur produced from sour gas under the gas clause, while in Pursue, the lessee contended that the industry had no consistent practice of paying for such sulphur under one clause or the other. Pursue I, 784 F.2d at 663-64. The court in Pursue I concluded that the ambiguity required further proceedings, so that extrinsic evidence could be admitted on industry practice, the parties’ intent, and other such matters as would resolve the ambiguity.
We observe that the present lease contains a specific royalty for sulphur and does not mention “other gaseous substance.” Furthermore, there is no stipulation or evidence that current industry practice is to pay one royalty or the other on hydrogen sulfide gas.1 The present case thus resembles Pursue and differs from Taslog.
Approximately six months after its unanimous opinion in Pursue I, the panel withdrew that opinion and held the exact opposite. Pursue II followed Taslog and affirmed the summary judgment for the lessor. It held that the lease unambiguously required royalty payments under the gas clause for sulphur extracted from sour gas. The two judges who changed their minds to become the majority in Pursue II stated, “The first issue is whether ... the lease unambiguously requires payment under the gas clause ... for hydrogen sulfide gas from which sulphur is produced.” 799 F.2d at 151 (emphasis supplied). The new majority found that Taslog, which was distinguished in Pursue I, provided “strong support” for the new result. The court explained its new holding as follows:
The hydrogen sulfide gas is ‘gas ... produced from said land.' The sulphur extracted from the hydrogen sulfide gas is not sulphur that is ‘mined.’
... No sulphur is ‘mined’ from the D’Lo Unit No. 1; rather, gas is produced and the sulphur is extracted from the gas.
799 F.2d at 151-52; see also Piney Woods Country Life School v. Shell Oil Co., 726 F.2d 225, 229 n. 3 (5th Cir.1984) (dictum).
The dissenter, Judge Jolly, who authored Pursue I, disagreed regarding what question was presented for review. He stated:
The question that the parties have asked this court to decide is not how to pay for the sour gas extracted from the land, but rather how to pay for the sulphur extracted from the sour gas.
Having framed a different issue for decision than the majority, Judge Jolly answered it thus:
Since the product to be paid for is sul-phur, and subsection (3)(c) explicitly provides for the payment of sulphur, I see no basis on its face for holding, that the contract unambiguously requires that sulphur be paid for under subsection 3(b).
799 F.2d at 153 (emphasis in original).
We agree with the majority in Pursue II that the leases require payment under the gas clause, section 3(b)(1).2 Therefore, we hold that the trial court erred in granting summary judgment for the lessor and in holding that payment should be made under the sulphur clause, section 3(c).
We are not convinced that sulphur extracted from hydrogen sulfide gas has been “mined” within the meaning of section 3(c). While it has been held that, at least in some circumstances, a gas well is a “mine,” Southland Royalty Co. v. Pan American [293]*293Petroleum Corp., 378 S.W.2d 50, 56 (Tex.1964); see also Amoco Production Co. v. Guild Trust, 636 F.2d 261 (10th Cir.1980) (applying Wyoming law), cert. denied, 452 U.S. 967, 101 S.Ct. 3123, 69 L.Ed.2d 981 (1981), these cases did not involve the production of sulphur from hydrogen sulfide gas. We are unwilling to extend the holding in Southland Royalty to the facts of this case in light of the rule that mineral leases are strictly construed in favor of the lessor. Compare Lone Star Gas Co. v. Stine, 41 S.W.2d 48, 49 (Tex.Comm.App.1931) (judgmt. adopted).
We recognize that the result that any court reaches on this difficult issue will be determined by how the question for decision is posed. The differences are starkly shown by the majority in Pursue II (“whether royalties for kydrogen sulfide gas from which sulphur is extracted shall be paid for under the gas clause rather than under the sulphur clause”) and by the dissenter (“how to pay for the sulphur extracted from the sour gas”).
We conclude that hydrogen sulfide gas is “gas”; that it has value; that it is not “sulphur mined and marketed”; and that it is not treated differently from any other gas by this lease. Therefore, as in Pursue II and Taslog, it should be paid for under the gas clause.
The point of error is sustained.
The judgment is reversed, and the cause is remanded to the district court.
DUNN, J., concurring.
SAM BASS, J., dissenting.