Validity of grant

It is undoubtedly essential to the validity of a grant, that there should be a thing granted, which must be so described as to be capable of being distinguished from other things of the same kind. But it is not necessary that the grant itself should contain such a description as, without the aid of extrinsic testimony, to ascertain precisely what is conveyed. Almost all grants of land call for natural objects which must be proved by testimony consistent with the grant, but not found in it.