[1][3] William senior died in 1876 after a successful career as a publican, leaving his wife £2,000 and naming his son as his executor, whom he described as a "Gentleman, Ballarat".
[3] William junior married Agnes Manchester (1848–1909) and they had one daughter, the physiotherapist Ada Sophia Rundell (1876–1963).
[4] In 1871, Rundell joined the Victorian Postal Department and in 1878 moved to the Correspondence Branch in Melbourne, subsequently moving to the city and from 1887 managing the branch[3] where he was also responsible for post office records until 1908.
[1] His collection was exhibited in 1900 at a display in Melbourne to celebrate the jubilee of the first stamps of Victoria in 1850.
[2] Rundell died in Sydney on 6 or 8 March 1936,[2][4][11] his body being cremated at Lidcombe Crematorium.