Fiona - Remember Sir Winston's great speech -'NEVER, NEVER, NEVER GIVE UP'.
There is an interesting marriage record dated 29 November 1894. I believe it's at St Bonaventure's, Tracadie, PEI.Alain Chartier MacDonald of Montreal married Rebecca MacDonald of Glenaladale. This was compiled by Marge Reid, firstname.lastname@example.org.
However, Burke's - THE LANDED GENTRY - 1952 issue, p. 1614 does show him."Alain Chartier, b. 1867, m. Anna dau. of MacDonald of Glenaladale, Prince Edward Is., and d. leaving issue - Eoin Harwood ".
Whether her name was Anna Rebecca or vice versa, I do not know.