The grantee acquires such fractional interest in every acre of the larger tract. Wallace v. Miller, 52 Cal. 655; Lawrence v. Ballow, 37 Cal. 518; Schenk v. Evoy, 24 Cal. 104; Gibbs v. Swift, 12 Cush., 377, 378; Brown v. Bailey, 1 Metc., 254. In the last case cited, in which a one-fifth interest in a homestead tract of land was devised, to be taken where the devisee should choose, Chief Justice Shaw, delivering the opinion of the court, said: "These words do not constitute a condition precedent to the vesting of the estate, but a right or privilege superadded to the devise, to be exercised or not, at the will of the devisee, upon partition.