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: (((("letters patent") OR ("letter patent"))) OR ("lettres patentes")).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"letters patent\") OR (\"letter patent\"))) or (\"lettres patentes\"))".
• Removing quotes may allow a broader search: (((( letters patent ) OR ( letter patent ))) or ( lettres patentes )).
• Adding a wildcard symbol may retrieve word variants: (((("letters patent") OR ("letter patent"))) or ("lettres patentes"))*.