Arthur LADNER was born 1868 (15730 / 1868) to parents Edward James LADNER and Harriett Fran BE(A)TTY. He died 1937 (15045 / 1937).
Death notice (with siblings mentioned) here:
http://nla.gov.au/nla.news-article203868034Obituary here:
http://nla.gov.au/nla.news-article73112056Moving to North Melbourne in 1898:
http://nla.gov.au/nla.news-article73042429 Edward and Harriet also hadthe following children:
1866 William Edward
1868 Arthur
1870 Frederick James
1872 Harriett Frances
1873 Claude Francis
1875 May Maude
1877 Ada Frances
1878 Howard Thomas
1881 Norman Oswald
1883 Edith Louisa
Harriett died in 1885 aged 40 (8875 / 1885) and Edward James remarried to Maria Jane HARVEY (1565 / 1886), they had th efollowing children:
1886 Hedley Victor
1888 Edwrd Ernest
1889 Ralph Robert
1891 Frank Hammer
1894 Leslie Gordon
1896 Elmy Mabel Theresa
Norman Oswald married Harriett PARK in 1905:
http://nla.gov.au/nla.news-article79074217 and died 7th October 1910:
http://nla.gov.au/nla.news-article80267862William BENSON - I'm assuming this is him - an engine driver who died 1897, though this is October?:
http://nla.gov.au/nla.news-article9774076Modified to add:
The only William BENSON I can see who died in 1897 in Victoria was 25 years old according to the Vic BDM index, with parents' names George BENSON and Mary Ann CHAMPNES. Can't see a birth for him in Victoria.