Donkeys and Presidential Humor
President Maclean (1854-68) was not without a sense of humor. One night two donkeys from a nearby farm were found on the top floor of Nassau Hall. A student on hand at the discovery asked Maclean, with an innocent air, how he thought they had got there. "Through their great anxiety," Maclean replied, "to visit some of their brethren."
Source: Leitch p. 296 ff