There is a Hugh Fagan aged 2 (not born in same County) in the 1841 census of Exeter, Devon, at no.5 Market St where there are several families. HO107/267/4 p.9
He is bracketed with Ann Riley 50 spinner b."I", and Sarah Riley aged 3 (not born in same County).

There is a "D" (ditto) for Sarah under Riley, but it is possible that this was a mistake by the enumerator, and both Fagan children were being cared for by Ann Riley.

Sue