Whitehead (1990), 37 E.T.R. 353 (B.C.S.C.); and Re Tuckett (1907), 9 O.W.R. 979 (Surrogate Court);(e) where a subsequent codicil was executed under the mistaken belief that one of the persons who would receive a residual bequest in the will had died: Sorensen Estate v. [read post]