McMahon Family Co Tyrone

Seeking any information relating to Patrick McMahon and family.  He was tried at Enniskillen in 1830 and sentenced to transportation to Australia.  Born 1780.  In 1839 his wife Ann was granted free passage to NSW.  She was resident at Ramackin Termonaguirk.  She was born Ann Hyndes c 1798.  Their four children also travelled to Australia:  Mary born c 1821; John born c 1823; Catherine born c 1828-9 (my great great grandmother); Francis born c 1830-31. It seems likely that Mary was married at the time she emigrated - possibly to a Mr Donnelly.