if age 67 correct there were 2 matchable manx Quirks - Thos s/o John + Mary Moore in Santan 17590819 but he being 1st child inherited Sulbrick + d 1842 I think - and the more likely
Thomas s/o John Quirk bapt Patrick 17601225 - however Quirk is a very common name in Pat + no other clues as reg did not give mother's name - possibly will of John 1775 - 1775 might be father - an orphan not likely to inherit is most likely to emigrate