Thank you for replying to my query.I've since found out that my gggrandmother is a McDermott, not a Devereaux.I do have Devereaux cousins and I was attempting to find out how they were connected and what Margaret's maiden name was.
The line I'm connected to is this--taken from 1900 US Fed census in city of Everett, Massachusetts:
John Devereaux born PEI Mar 1844 age 56 m 25 yrsM-Nwfld F-Ireland
wife Eliza (nee Murray) born April 1861 Nfld mother of 7 with 6 living childrenM--NwfldF-Ireland
Issue:James WSept 1877age 22 Mary AMar 1879age 21 Annie LJan 1884age 16 RichardMar 1886age 14 Gertrude Dec 1890age 9
My cousins were children of James W Devereaux.I guess there is no connection to your family but thanks again for writing in. :)