Perhaps you should try some spelling variations:
"john wall callcott" » "john well callcott", "john wall calcott", "john wall caldecott", "john wall talcott"
"john w callcott" » "john w calcott", "john w caldecott", "john w talcott"
"john william cannicott" » "john william kennicott", "john william winnicott", "john william caldicott"

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: (((("john wall callcott") OR ("john w callcott"))) OR ("john william cannicott")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"john wall callcott\") OR (\"john w callcott\"))) or (\"john william cannicott\"))".
• Removing quotes may allow a broader search: (((( john wall callcott ) OR ( john w callcott ))) or ( john william cannicott )).
• Adding a wildcard symbol may retrieve word variants: (((("john wall callcott") OR ("john w callcott"))) or ("john william cannicott"))*.