2. It is either express or implied. It is the former when revoked in express terms by a codicil or later will; it is implied when by the acts of the testator it is manifestly his intention to revoke it; for example, when a specific legacy of, a chattel is made, and afterwards the testator sells it; or if a father makes provision for a child by his will and afterwards gives to such child, if a daughter, a portion in marriage; or, if a son, a sum of money to establish him in life, provided such portion or sum of money be equal to or greater than the legacy. 2 Fonbl. 368 et, seq. Toll. Ex. 320; 1 Vern. R. by Raithby, 85 n. and the cases there cited. 1 Roper, Leg. 237, 256, for, the distinction between specific and general legacies.