I'm also looking for Margaret Devitt b 1855/6 daughter of Edward Patrick Devitt and Ann Unknown and listed as living in Elswick, Newcastle Upon Tyne in the 1871 census. Parents Edward and Ann are listed as born Ireland, but Margaret and her younger brother John are listed as born Manchester. My intuition is that Margaret married Henry Pearce--however intuition doesn't apply under the circumstances! Given Edward and Ann's ages it seemed likely there would be older children. I recently purchased the entry of birth for an 1854 birth of Edward Devitt in the sub-district of Chorlton upon Medlock, County of Lancaster. The Edward on this certificate was born on 21st December 1853 at 2 Ivy Street to Patrick Devitt, labourer, and Ann Devitt formerly Rourke with the 'Signature, description and residence of the informant' "x the mark of Ann Devitt, mother, 2 Ivy Street, Chorlton upon Medlock". So it seems the Margaret on Sylvie's registration had an older brother Edward Devitt. I'm still searching for a Margaret born to Edward Patrick rather than Patrick...I'm trying to work out how traditional family naming patterns might apply, however just get more confused!