George Thomas Tilden
As well as buildings in New York City , Washington , D . C . , and Charleston , South Carolina , the firm's work included the Milton Town Hall , Sargent Normal School and Gymnasium at Cambridge , the Wellesley College Art Museum , Plymouth High School , Jesup Hall at Williams College , the Billerica Public Library , the Blue Hill Observatory , and Boston's American Legion Building . 
<triplet> Blue Hill Observatory <subj> Milton <obj> located in the administrative territorial entity