Perhaps you should try some spelling variations:
"sir thomas nicholson, colt baronet" » "sir thomas richardson, colt baronet", "sir thomas wilson, colt baronet", "sir james nicholson, colt baronet", "sir thomas nicholson, holte baronet", "sir thomas nicholson, cox baronet", "sir thomas nicholson, cobb baronet"
"sir thomas dickson, first baronet" » "sir thomas jackson, first baronet", "sir thomas dawson, first baronet", "sir thomas denison, first baronet", "sir thomas dickson, first barrier", "sir thomas dickson, first tyrone"

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: (("sir thomas nicholson, colt baronet") OR ("sir thomas dickson, first baronet")).
• Removing quotes may allow a broader search: (( sir thomas nicholson, colt baronet ) or ( sir thomas dickson, first baronet )).
• Adding a wildcard symbol may retrieve word variants: (("sir thomas nicholson, colt baronet") or ("sir thomas dickson, first baronet"))*.