McMurtrie worked for the Ludlow Co. from 1927 onward, on full-time and part-time contracts of various sorts. His title was Director of Typography. He supervised or consulted on most of the company’s advertising and type design into the mid-1930’s and selectively thereafter. Many of these files came to the Newberry in the “Subject” sequence (Series 2) and seem to derive not from files kept in his Ludlow office but from parallel files that he maintained at his private offices. There is some additional material about Ludlow in Series 1 (Correspondence).