Please enter a year and/or Surname(s).

The % sign acts as a wildcard in the Surname box:
C% will find Cadagon, Cudduggan, Cadwgan, Charles, Cooper etc.
Wa% will find Waters, Watters, Walters, Watkins etc.
%s will find Williams, James, Giles, Thomas, Jones etc.
C%s will find Cross, Charles Collins etc.
The _ (underscore) sign acts as any one letter:
_owell will find Howell, Powell etc
_%l will find Howel, Howell, Powel, Powell, Cecil, Blackwell

If your search is unsuccesful, try putting % before and after the surname
in case there are two alternatives... eg. %Jones%