From the May 16, 1911 New York Times:

“The New York Zoological Society celebrated its second annual members’ day yesterday at the Zoological Garden. The members of the society are important adjuncts of the New York Zoo. Dues of members help to support the Zoo. There are 1,469 members paying $10 a year, in addition to the life members, benefactors and founders. The meetings are held at the Zoo, so that the members may see and appreciate all the interesting features, which are due to a great extent to them.

This year they met in the new Administration Building, which was opened last November and to which members are always admitted. The National Collection of Heads and Horns, one of the finest in the world, and which occupies a large part of the second floor of the building, had a new feature yesterday, the great white rhinoceros head of the animal shot by Col. Roosevelt, which was placed in the collection on Saturday.

The visitors arrived at the Administration Building at 2 P.M., and, after visiting the collection, wandered around the Garden as they pleased until 4 o’clock, when they came back for tea. The feeding of the monkeys was the sight of the day, the seven great apes sitting at a long table and manipulating forks with skill, while Susie, the young chimpanzee recently purchased from the monkey expert, Prof. Richard L. Garner, sat at a low table in the very front, the only one of the animals who was dressed for the occasion. Susie was wearing a new style harem skirt. She ate like a lady.”