Hi Sally, I have a distant connection with the McCrossens of Woolwich. They were not catholic. There are plenty of references to their marriages, baptisms etc. on Ancestry for the family of Alexander & Catherine McCrossen, all taking place at Anglican churches. I haven't seen any reference to a son James but he could be one of theirs. Alex and Catherine are in in the census of 1841. I think Alex died 1863 and Catherine 1858. There are marriage certs for daughter Sarah to William Hall in 1844, son Alexander to Elizabeth Driscoll in 1846. Another person says there was a son Jeremiah, who was in the army in 1841 and a pauper in 1901. For spellings also check: Crosen, Crosan, Crossen, McCrosen etc... Also some of the ancestry transcribing is wrong. I have tried to make correction notes where possible.