Very welcome!
Here's the 1851 census for Sarah
1851
HO107/1685 111 25 & 112 26
Thatcham, Berkshire
Cold Ash Road
Joseph Brown, head, mar, 52, Ag lab, b. France
Sarah, wife dau, mar unm, 27, b. Berks Bucklebury
Mary A, dau, 17, b. do.
William, grandson, 3, b. Thatcham
Benjamin, grandson, 6 m, b. do.