Need parents of Robert Mc Burney Canada>Malden MA

I am trying to trace back on the ancestry ofRobert McBurnie birthdate unknown in Canada.He married Julia A. Cameron dau of David N. and Harriet (Olcutt) Cameron.Julia was born 29 Sept 1864.Her father David Cameron was born 20 Sept. 1841 Waughs River, Tatamagouche, Nova Scotia.I assume Julia was born in Nova Scotia.Robert died before June 1900 Census for Malden, Massachusetts where Julia & her children are listed as living with her parents David & Harriet.