Getting a bit desperate I know but -- Is it worth looking at this family which does seem to have a few features in common?
In 1851 there is a family at North Street, Isleworth
John RYDE, 30, Lawyer b Kingston, Surrey
Amelia wife, 24, b Isleworth, Middlesex
Charlotte, dau, 8, b Lee, Kent
John, son, 3, b Isleworth
Amelia, dau 2, b Isleworth
William son 10 mths, b Isleworth
Amelia SAUNDERS mother in law 59, Widow, formerly greengrocer’s wife b Hammersmith.
The father of Amelia nee SAUNDERS was according to marriage cert, Thomas, a Baker.
There is another marriage of a Caroline SAUNDERS May 16th 1841 to Thomas GODDARD, a Gardener. Caroline’s father Thomas SAUNDERS a baker.
Although the RYDE family can be found in other censuses I do not see John (b 1848) with them