I do not find any matches although I find a lot of similar names. I have an Isobel MacCurry b. 1796, Strachur, Argyll who married Duncan McKellar. I have no Jane McLachlan, but there are probably people I am still unaware of. I do have a Donald Ferguson b. 1828 who married Catherine Currie in 1858 in Winona, MN. So far, I have not been able to determine if Donald is a member of the same Ferguson line or not. The Alexander Ferguson born in 1777 I have no information on at this time. Sorry if this isn't much help.