This sub-series consists of illustrations and photographs which were included as part of a number of Dr. Penfield's published writings. Each of the series' file numbers (ex. W/PV XX) correspond to the published writing file in which the images were used (ex. W/P XX).

A small collection of visual material (mostly oversized illustrations) used in several of Dr. Penfield's published books.

Subseries consists of unpublished writings, arranged by subject. This sub-series includes lecture notes, unfinished jobs, and some published writings. In addition, W/US 33, 34 and 35 consist of similar material which was found loose in Dr. Penfield's office after his death. (W/US = Writings / Unpublished by Subject)

This sub-series contains non-professional material created by Dr. Penfield which was unfinished at the time of his death in 1976.

This sub-series consists of records generated by Wilder Penfield as Director of the Montreal Neurological Institute. This consists primarily of correspondence and reports about teaching curricula, budgetary information, maintenance, staff concerns, and general university affairs created through his activities with the administration of McGill University (Deans of the Faculty of Medicine and the Faculty of Graduate Studies and Research, Office of the Comptroller/Bursar, Presidents of the University, etc.).

This series contains several of Dr. Penfield's personal appointment diaries, and several diaries of his wife, Helen Kermott Penfiedl. It also currently includes a photograph album from 1913-1916, a scrapbook from Dr. Penfield's time at Galahad School (1905), some miscellaneous material collected by Dr. William Feindel concerning Dr. Penfield and the Montreal Neurological Institute, and an old reprint mailing list compiled by Dr. Penfield.

Sub-series consists of bound appointment diaries used by Dr. Penfield to kep track of both his personal and professional engagements between 1930 and 1976.

Materials collected and created by Dr. Penfield in producing writings which were not books, and for which no reprints exist. (W/PNR = Writings/Published No Reprint)

Subseries consists of visual material Dr. Penfield used to illustrate his writings. (W/V = Writings / Visual)

Subseries consists of unpublished writings, including talks, addresses, articles, unfinished papers, etc. many of which are printed or published, in full or in part, in some other form and filed elsewhere. (W/U = Writings / Unpublished)