Perhaps you should try some spelling variations:
art historian » art historians, art historical, a historian
brian halpin » brendan halpin, brian halligan, brian alan
brian dillon » brian dill, brian hill, brian detlor
brian allen » brian alan, brian muller, julian allen

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: ((((brian allen) OR (brian dillon))) OR (brian halpin)) (art historian).
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((brian allen) OR (brian dillon))) or (brian halpin)) (art historian)".
• Adding a wildcard symbol may retrieve word variants: ((((brian allen) OR (brian dillon))) or (brian halpin)) (art historian)*.