Art: Many Mansions

Stretched eastward from Manhattan in the shape of a candle-flame, lies Long Island. Here, in a country made for pleasure, live socially-minded persons who dart to their diversions along concealed and crooked trails, inserted through the woods or strewn upon the shore. Their houses, lying between hills or built above bright beaches, are walled with forests and reticent behind curling drives. Who builds them and makes them beautiful?

There occurred in Manhattan last week a party which partially answered both questions. The party was given to celebrate the 25th anniversary of their partnership, by the firm of Delano and Aldrich, architects,...