Jane Margaret Sweet born June 1841 Mary Elizabeth Sweet Jul-Sep 1842 Richard Whinfield Sweet Oct-Dec 1843
I really don think those children are William/Elizabeths although I cant prove it at present;
1851 we have;
William Sweet, 39
Elizabeth Sweet, 37, born Hexham
William Sweet, 15
Ann Sweet, 9
Margaret Sweet, 7
Ellen Sweet, 2
Thomas Sweet, 6 mths
1861 we have;
Elizabeth Sweet, 56, Head, Widow, Laundress, born Hexham
William Sweet, 24
Ann Sweet, 19
Thomas Sweet, 10
George B Sweet, 8
Elizabeth Sweet, 5
Margaret A Sweet, 3
William Knox, 50
George Hall, 25
GEORGE BELL Sweet Bapt 18 Jan 1853 to WILLIAM/ELIZABETH
1871 Census
Thomas Routledge, 37
Mary Routledge, 33, born Hexham
John Routledge, 10
William Routledge, 7
Thomas Routledge, 5
George Routledge, 3
Eleanor Routledge, 1
Thomas Sweet, 20, Other relative****
George Sweet, 18, Other relative****
As you know Thomas married Mary Sweet.
I also think William died 1856;
SWEET, WILLIAM age 45
GRO Reference: 1856 J Quarter in NEWCASTLE UPON TYNE Volume 10B Page 23
The 1851 William was age 33
ELIZABETH Robson Bapt 9 June 1814 Hexham to THOMAS/DOROTHY
Marriage at John's Parish Church, Newcastle on 9? Aug 1840 of William Sweet, Widower (House Carpenter) & Elizabeth Robson, Spinster**; both of full age & of this Parish. Fathers = William Sweet (Cabinet Maker, deceased) & Thomas Robson (Miller).