I'm hoping to find out about this family. Looks like David and Catherine married in New Brunswick (just a guess since he was born in Scotland and Catherine in NB] I believe Catherine's maiden name was Whitehead.
On New Brunswick Vital Stats there is a birth for a ----Ann Lawson, b 28 Nov 1888, d/o David Lawson & Kate Whitehead.
I can't seem to locate the family on any other census. Daughter, Lilly, lived and married (1906)in Toronto
 census Chatham Northumberland NB
David, 38, b Scotland, parents b Scotland, policeman
Catherine, 32, NB, father b Scotland, mother b NB
Lily, 6, b Ont
James, 4, NB
Catherine, 2, NB
Mary, 4/12, NB
Any help appreciated, since I live in Texas and don't have access to Canadian Ancestry.