Other members soon joined the group in their mission, the first of which were Fredrick H. Waldron and Wayne M. Musgrave. Ervin knew some of the alumni brothers of Delta at Marietta and asked them to send the first letter to Delta. On March 27, 1907, Ely, Crenshaw, Musgrave, Waldron, and Waterbury traveled to Marietta and were initiated into Alpha Sigma Phi. Upon returning to New Haven, they initiated the other friends they had recruited into the new Alpha chapter at Yale.