From the 1861 census for Brock Twp.
B. Martin, male, 63, born Ireland, farmer
C. Martin, female, 57, born Ireland
? Martin, male, 24, born Upper Canada
H. Martin, male, 22, born Upper Canada
Con Martin, male, 18, born Upper Canada
J.A. Martin, female, 13, born Upper Canada
E. Martin, female, 14, born Upper Canada
E. Martin, female, 12, born Upper Canada
M. Martin, female, 3, born Upper Canada
T. Martin, male, 25, born Upper Canada, farmer
M. Martin, female, 27, born Upper Canada
S. Martin, male, 5, born Upper Canada
The family of T. Martin is listed as the next family on the census after the family of B. Martin.
There is another Martin family on the same page but the initial and age of the head doesn't match with Bernard but I'll list it anyway.
C. Martin, male, 64, born Ireland, farmer
M. Martin, female, 50, born Ireland
W. Martin, male, 27, born Upper Canada
C. Martin, male, 22, born Upper Canada
M. Martin, female, 20, born Upper Canada
J. Martin, male, 17, born Upper Canada
C. Martin, female, 15, born Upper Canada
Jas. Martin, male, 13, born Upper Canada
E. Martin, female, 10, born Upper Canada
There is a death in the Ontario deaths database in Brock Twp for a Constantine Martin that matches C. Martin in terms of year and place of birth.
Jacquie