The 1851 census has Wm + Margaret at Knockaloe (Kk Patrick) just outside Peel - he is an ag lab claiming birth in Peel - with them as a 'visitor' is Isabella Quirk - she is wife/widow? of Wm Quirk (m Marown 1823) - given as infirm - she is dau of Thomas Sayle by Elizabeth? Fargher (faregher in transcription but no first name given for mother - bap Patrick 20 Mar 1808 - ? is she the mother of Wm ?illegitimate born pre marr to Wm Quirk