In 1956, the officers of Phi Mu were Mary Ann Walter, President; Jan Westcott, Vice-President; Elizabeth Baird, Secretary; and Joan Howell, Treasurer. Phi Mu supported its philanthropies at the Children's Home in Carlisle and the Carlisle Hospital with a variety of activities including selling stationary, cookies, and cowbells at football games. They also hosted Halloween and Christmas parties at the Children's Home. Their social calendar included informal pizza or spaghetti dinners, as well as the pledge and spring formals.
Walter, Mary Ann
The 1955 Microcosm gave the task of selecting the year's "Miss Microcosm" to Jack Webb, a "well-known personality in the theatrical world." Of the eight portraits of Dickinson College coeds sent to him, he chose Joanne Neilson as "Miss Microcosm." Runners-up included: Susan Marquardt, Patricia Eshelman, Jeanne Carlson, Jocelyn Peltz, Carolyn Fitzcharles, Jane Lewis, and Mary Ann Walter.