File contains documents relating to Alexander Leighton's 1959 trip to Nigeria. Includes a photograph, several bundles of research notes, schedules, graphic materials, and patient medical notes. Includes an article from the New York Times on the Nigerian election, and no. 10 of the Western Nigerian Illustrated quarterly publication featuring an article about psychiatric treatment at the Aro Hospital. Also includes an envelope labelled 'thought disorder pills' containing five spherical pills.