In this case several questions, of more or less difficulty, have been submitted, the principal one being a question of boundaries, depending on the construction to be given to the mortgage deeds, under which the demandant claims title The first of these deeds, from Sylvanus Learned to Andrew Sigourney, is dated in 1801 ; and the land mortgaged is thus described : u A certain farm or tract of land, lying in the north erly part of Oxford, containing by estimation two hundred acres, be the same more or less, bounded west on land of Ebenezer Learned, north by Jacob Works, east by a town road and Reuben Lamb, and south by the land of Asa Conant to the west line, first mentioned.”
The second deed from said Learned to said Sigourney is dated in 1806, and the land then mortgaged is described as follows : “A certain farm or tract of land with the buildings thereon, lying and being m the northerly part of Oxford, containing by-estimation two hundred acres, be the same more or less, bounded westwardly on the late Ebenezer Learned’s farm, north on Jacob Works, easterly on a town road, Israel Stone and others, and southerly on the late Asa Conant’s farm.”
The descriptions of the land conveyed by the two deeds are not precisely similar ; but .undoubtedly the same tract of land was intended to be described in both deeds. The question is whether the Butler lot, which is now demanded, be embraced by these descriptions. The difficulty of construction arises *380from the imperfect description of the easterly line of the lot mortgaged.*
By the first deed the land conveyed is bounded easterly by a town road, and Reuben Lamb. And by the second deed, die same is bounded easterly by a town road, Israel Stone, and others. Both descriptions of this line are defective, but arc correct as far as they go, whether the Butler lot be included or not. In either case, the land is bounded - easterly by a town road, and by lands of Reuben Lamb, and Israel Stone, and also by land of Luther Stone, as appears by the survey, and the testimony of the surveyor. By his testimony also it appears that the farm mortgaged, exclusive of the Butler lot, was commonly called the old Learned farm, and was always separated from the Butler lot by a fence : And that it measured one hundred and ninety-one acres and sixty-one rods, which nearly corresponds with the measure as estimated in the two deeds. This evidence favors the presumption that the Butler lot was not intended to be included in the mortgages ; and the presumption is fully confirmed by the other evidence in the case.
When the construction of a deed is doubtful, great weight is to be given to the construction put upon it by the parties, especially in doubtful queslioris of boundaries, which must be presumed to be within their knowledge. When both parties, therefore, agree as to the boundaries and lines of a lot, they must be taken to be the true boundaries and lines, unless the contrary can be clearly shown. In the present case it was conclusively proved that, by the construction given to the mortgages by the *381parties, the Butler lot was not included. In 1810, Sylvanus Learned mortgaged this lot to James Butler, which mortgage was afterwards discharged; and in 1818, the said Learned conveyed the same lot to the said Butler in fee, with covenants of seizin and warranty, and that the premises were free of all incumbrances. The grantee entered under that deed, and the tenant holds by sundry mesne conveyances from him. No claim has been interposed, until recently, to this lot, by Sigourney or by any one claiming under him; but the tenant, and those under whom he claims, have had seizin and possession of the premises ever since the time of the execution of the last deed to Butler.
In 1821, Sigourney, the mortgagee, entered for condition broken on the farm, exclusive of the Butler lot, and thereupon leased the premises to Abislia Learned, the agent and attorney of the mortgagor, for the term of three years. And by this lease the premises are bounded easterly on James Butler, Israel Stone and a town road.
This evidence shows clearly the understanding and intention of the parties, according to which the Butler lot was not included as a part of the mortgaged premises. This construction of the mortgage deeds, thus expressly admitted by the repeated acts of the parties, must be deemed the true construction, unless it be repugnant to the descriptive language of the conveyances. And it is manifest that there is no such repugnancy. The easterly and indeed the southerly lines of the mortgaged premises are imperfectly described ; but so far as they are described, the description is sufficiently correct.
It was objected, in the argument by the demandant’s counsel, that the parol evidence of the acts of the parties was not admissible. But there is no ground for this objection. When the language of a conveyance is unambiguous, no parol evidence to vary or control its import is admissible. But where the language is doubtful, especially in the description of the land conveyed, there evidence of the practical construction by the parties is admissible to explain and remove the doubt. 3 Mass. 362. 10 Mass. 149. 16 Pick. 239. 1 T. R. 701. Besides. *382in the descriptive parts of the two mortgages, there was a latent ambiguity, which clearly authorized the admission of the parol evidence.
Upon the whole matter, therefore, we are of opinion that the Butler lot was not included in either of the mortgages from Learned to Sigourney, and consequently, according to the agreement of the parties, the demandant is to become
Monsuit.
The sketch below will show the eastern boundaries of the land mortgaged