Perhaps you should try some spelling variations:
"john wallis callcott" » "john wallis caldecott", "john wallis talcott", "john wallis walcott"
"john wellins calcott" » "john welling calcott", "john wellins talcott", "john wellins walcott"
"john william tapscott" » "john william talcott"

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 wallis callcott") OR ("john wellins calcott"))) OR ("john william tapscott")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"john wallis callcott\") OR (\"john wellins calcott\"))) or (\"john william tapscott\"))".
• Removing quotes may allow a broader search: (((( john wallis callcott ) OR ( john wellins calcott ))) or ( john william tapscott )).
• Adding a wildcard symbol may retrieve word variants: (((("john wallis callcott") OR ("john wellins calcott"))) or ("john william tapscott"))*.