Peter Montgomery died at Trenton, Pictou county on 04 Aug 1913. The informant is unknown in my family tree so there are a few suspect entries, namely that he was single. Might have been separated but was more likely was at Trenton for work, sending money back to Frances at Bass River.
Considering Peter, a Roman Catholic, was supposed to be buried at Bass River where Frances Ellen Hayman/Hyndman lived near her brother, Eri Sylvester Hyndman and father, William Hyndman (Methodist) who died in 1912, there may be an undocumented family plot near Bass River. Failing that, I'd suggest checking the RC cemeteries near Trenton.