Born in Grinnell, Iowa, Benjamin and his wife Mabel moved to California in 1925, settling briefly in LA, then in 1929 moving to Chico, before retiring to Berkeley in 1939. While living in Iowa, they adopted twins who had been born in Australia, but whose mother died in the 1918 Chicago influenza epidemic. The twins (Edward and Elizabeth) corresponded with their brother in Melbourne, and in 1930 visited him and the family there; in 1943 the brother (Claude) visited all the Rickers when he passed through San Francisco, and left a journal of his impressions. Edward (born Ivor Rosier) died 9 June 1944 as part of the D-day struggle, but Elizabeth (born Edith Rosier, later married to Vernon Marcellus) died in s. California in 1983. I am trying to find who in that branch of the Ricker family might have access to or know the destiny of letters exchanged between the Rickers and the Australian kin. Benjamin died in Berkeley in 1950, and Mabel five years later in Berkeley, where several other Rickers were living.