I suppose Mr Agnett is a lodger or a boarder.

1861 says East Malling for Susannah (children Charlott, Fanny and Celia still at home), 1871 says Loose again (no children at home).
Edit: I
hope this is not their marriage

GEORGE BROWN - SUSANNA SMITH
Marriage 14 OCT 1827 East Barming, Kent
(I hasten to add that I don't know where East Barming is)
There is a Susannah Smith birth 1808 in Loose on the IGI but also one in East Malling ...