Hi Roger,
I am in Aust where my Tattersall connection began,I cant help with Mary,but you may be able to help me or make something of:-James Tattersall m Tabitha Kay 1790 Bury,St Mary,Lancs, they had 3 children (there must have been many more) known to me -Tabitha b. c1796 Holcombe, Nancy b.1812 Haslington, Henry b 1820.
Thanks ,Michael