Bourque Walker

I have been researching my family for a few months now, and I haven't been able to find any information on my great grandmother's family. My great grandfather's name was Allen Walker, he married Maria Bourque and had my grandmother ( an only child I assume) Barbara Walker, who married Raymond Deslatte. I have searched both Walker and Bourque, but I'm not sure where to begin. If anyone is familiar with this family, or has any further information, please let me know.
Thanks!
Mel