Forgot to say, Ulster Historical Foundation only have four Adam Stirling marriages recorded in county Antrim. The years being 1846, 1889, 1903 and 1918. I suppose the 1889 one may just be your Adam's first marriage (the name Jane McClelland turns up quite often in Antrim/Down in the 1800's, but the UHF do happen to have a Jane McClelland marriage for 1889 which may or may not tie in with Adam Stirling - it is a pay to view site so limited free information) and you know who the 1846 and 1903 are likely to relate to.