Mr. Lankenau also assisted Dr. Jack R. Gannon in compiling information for his history of the World Federation of the Deaf. This series is mostly correspondence between Mr. Lankenau and various groups affiliated with the WFD, requesting details on their history and activities.

A small collection of booklets acquired by Mr. Lankenau, including ones signed by Ben Schowe and the prominent chemist Otto Eisenschiml.

The bulk of this series is black-and-white snapshots from Mr. Lankenau’s time as a Gallaudet student, arranged by subject. This includes some photos from stage shows that Mr. Lankenau played in (see series 3 for more) and other student activities, as well as campus and classroom photographs. There are a few photos from later in Mr. Lankenau’s life, including photos from his 35th year of service party at Firestone in 1975.