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

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