OPINION
STONE, Justice.The Benedictine Sisters of the Good Shepherd (hereinafter “the Sisters”) appeal from a takenothing judgment rendered in favor of appellees (hereinafter “the Ellisons”) in a suit brought by the Sisters to establish an easement by necessity across the Ellisons’ property. For the following reasons, we reverse and remand.
Factual Background
The Sisters and the Ellisons own adjoining tracts of land located in Starr County, Texas. Record title to these tracts originates from a 1925 partition decree in which a 6807.8 acre plot, known as Porcion No. 75, of the former jurisdiction of Camargo, Mexico, was divided among its owners. One of the owners, The Texas Company (hereinafter “Texaco”), was awarded 115.87 acres, (tract 19), and Eva Marks Laborde was awarded 698.62 acres (tract 18). Importantly, the partition deed did not provide ingress and egress for the parties to their respective tracts. Farm to Market road 3167 (hereinafter “FM 3167”), which connects this ranching community, El Sauz, to Rio Grande City, lies to the east and northeast of tract 19, but there is no access to FM 3167 from tract 19. The Ellison property, tract 18, is located between tract 19 and FM 3167.
Thurman G. Ellison purchased tract 18 in 1954 from the First State Bank and Trust of Rio Grande City. The Ellisons are the successors-in-interest of tract 18. Evidently, Texaco never utilized its property and began leasing it to Ellison for cattle grazing in 1972. *631During this time, Texaco and Ellison had an unwritten agreement allowing Texaco’s ingress and egress onto its property. This arrangement continued for approximately fifteen to twenty years.
In 1993, Texaco gifted tract 19 to the Sisters. Upon acquiring the property, the Sisters began plans to build a monastery on the land and sought an easement from the Ellisons so they could access the land from FM 3167. Following a bench trial, a take-nothing judgment was entered against the Sisters. This appeal follows in which the Sisters contend that the evidence before the trial court established the elements of an easement by necessity.
Standard of Review
Whether the Sisters are entitled to an easement by necessity is a question of law. We review a trial court’s conclusions of law de novo. Piazza v. City of Granger, 909 S.W.2d 529, 532 (Tex.App.—Austin 1995, no writ). A conclusion of law will be reversed if it is erroneous as a matter of law. Id.
Easement by Necessity
An easement by necessity is established with proof of (1) unity of ownership of the dominant and servient estates prior to severance, (2) necessity of a roadway, and (3) existence of the necessity at the time of the severance of the two estates. Koonce v. Brite Estate, 663 S.W.2d 451, 452 (Tex.1984); Estate of Waggoner v. Gleghorn 378 S.W.2d 47, 48 (Tex.1964).
1. Unity of Ownership
To establish unity of ownership, the Sisters had to show that prior to severance, their grantor, Texaco, owned the dominant and servient estates as a unit or single tract. See Koonce, 663 S.W.2d at 452. The Ellisons claim the Sisters failed to establish unity of ownership because there is no evidence that Texaco owned the Ellisons’ property. The Ellisons contend the evidence conclusively established that their tract was purchased from First State Bank and Trust of Rio Grande City, and that the two tracts were not unified at the time Texaco gifted the property to the Sisters, at the time the Ellison property was purchased, or at the time of the 1925 partition.
It is undisputed that the Ellisons’ land and the Sisters’ land were carved out of the 6807.8 acre plot by a 1925 partition decree and that Texaco, the Sisters’ grantor, acquired tract 19 pursuant to such partition. The partition decree indicates that the 6807.8 acre plot was one unit owned by more than a hundred individuals as tenants in common, including Texaco. As a tenant in common, Texaco owned an undivided interest in the whole. See Black’s Law Diotionary 1314-15 (5th ed.1979). That is, Texaco owned an undivided interest in the entire 6807.8 acre plot, and thus had an ownership interest in the dominant and servient estates, albeit with numerous others, as a unit prior to severance. The Ellisons’ contention that prior to partition each landowner treated his land as separate property has no bearing on the common ownership principal at work. Partition dissolves a tenancy in common, vesting in each owner a sole estate in a specific portion of land. Dierschke v. Central Nat’l Branch of First Nat’l Bank at Lubbock, 876 S.W.2d 377, 379 (Tex.App.—Austin 1994, no writ). Accordingly, despite the practices or understanding among the co-owners, each co-owner retained an interest in the whole prior to partition. The evidence therefore establishes the first element of unity of ownership.
2. Necessity of Roadway
Next, the Sisters had to show that the roadway sought was necessary to access their land and not for mere convenience. See Duff v. Matthews, 158 Tex. 333, 311 S.W.2d 637, 643 (1958). The Sisters maintain that this element of proof is satisfied because they cannot access their property from a public road and the Ellisons’ property is the only property adjacent to their property which has such access. Despite these facts, the Ellisons contend necessity is not established because there are at least two other landowners from whom the Sisters could obtain access to their land, and in fact, the record indicates that Victor Garcia allowed the Sisters to access their property through his land.
*632It is undisputed that the Sisters’ property is landlocked. It is also undisputed that the Ellisons’ property abuts only two sides of the Sisters’ property, which theoretically allows for alternate routes for the Sisters to gain access to their land. The evidence, however, disproves the theory. The landowners to the south and wést do not have access to a public road; the Ellisons are the only landowners adjacent to the Sisters with immediate access to FM 3167. Additionally, the evidence shows that Victor Garcia’s wife, not Victor, owns the land over which the Sisters were allegedly granted permission to enter their property. Further, this property does not abut the Sisters’ property. Thus, even if Victor could .permit the Sisters to cross his wife’s property, such passage would not give the Sisters access to their property. The evidence therefore establishes the necessity of a roadway because no public road provides a way of ingress or egress to the Sisters’ property. See Heard v. Roos, 885 S.W.2d 592, 596 (Tex.App.—Corpus Christi 1994, no writ).
8. Existence of Necessity at Time of Severance
Finally, the Sisters had to establish that the necessity of the easement existed at the time of the severance of the dominant and servient estates. Koonce, 663 S.W.2d at 452. As noted, FM 3167 is the only public road which provides access to the Sisters’ property. The existence of this road prior to the 1925 severance was established by the testimony of- Julio Gutierrez. Gutierrez, born in 1911, testified that he first travelled on what is now FM 3167 in 1917 or 1918 to reach Rio Grande City from El Sauz. Improved only by the addition of pavement, the road remains the same. The evidence thus establishes that at the time of severance, tract 19 could not be accessed from a public road without an easement over tract 18.
Further evidence of necessity was provided by Joel Guerrero, who went onto the property at Texaco’s request while Texaco still owned the land. Guerrero testified that an unwritten 1 agreement existed between Texaco and the Ellisons giving Texaco access to its property by going across the Ellisons’ property. When Guerrero went onto the Texaco property, he first had to obtain the Ellisons’ permission to cross their land.
We find that the foregoing evidence discharged the Sisters’ burden in establishing their right to an easement by necessity. Our law recognizes that owners of landlocked property should not be deprived of the use, benefit, and enjoyment of their land. See Alley v. Carleton, 29 Tex. 74, 78-79 (1867); Richter v. Hickman, 243 S.W.2d 466, 468 (Tex.Civ.App.—Galveston 1951, no writ). When Porcion No. 75 was divided among its owners, and Texaco was awarded a landlocked tract 19, an easement by necessity arose. Accordingly, point of error number one is sustained. In light of our disposition of point of error number one, we do not reach the Sisters’ remaining points of error. See Tex.R.App. P. 90(a).
The judgment of the trial is reversed and the cause is remanded to the trial court for proceedings consistent with this opinion.
DUNCAN, J., dissents with opinion.