Mary Peterson Potter, Knox College, operates an auto-copy machine at at the Chicago Executive Office, likely either the 2108 Chicago Daily News Building or the 1709 London Guarantee Building. This photograph was published in The Trident and History of Delta Delta Delta.
Tri Delta Fraternity occupied the 2108 Chicago Daily News Building, Chicago, Illinois, Executive Office from 1941-1956 and the 1709 London Guarantee Building, Chicago, Illinois, Executive Office from 1956-1961.
