And the 1871 Census would've shown the Sibley family too ...
Jane
Jane,
Way back when the announcement was first made about who would appear in the Aussie version of the show, just for my own interest I did some research on Cathy's family tree. (And also Ita Buttrose's!)
George Charles Sibley from Dorset was the son born Sep qtr 1865 in Broadwinsor to David Sibley, Labourer, and Sarah Neale, who married in the Beaminster district in 1861. By 1871 they had 5 children. RG10/ 2026/ 20/12
When they were showing one of his certificates on the show, you could just see the name David Sibley as the father.

David Sibley is with his widowed mother Jane in 1861, RG9/ 1364/ 91/ 2
and in 1851 HO107/ 1860/ 171/ 6
he is with mother Jane and older sibling George and younger sibling John.
In 1841 Jane Sibley has 4 young children with her....no sign of a husband. But there are lots of other Sibleys on the same census page.
.....dee