Correspondence, lists of specimens and books borrowed, 1943 - 1966

Mook's papers consist of two folders containing annotated manuscripts, pencil illustrations and charts on fossil mammals and reptiles with notes and exchanges with William King Gregory, William Diller Matthew and Childs Frick. The collection includes materials for courses at Columbia University and outlines of lectures by various lecturers. The materials are organized into two folders and are roughly chronological, though many items are undated.

There is also correspondence and Mook's papers on Crocodilia.