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.

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.

Subseries consists of published accounts (articles or stories). (E/P = Events / Published)

This sub-series includes the notes, drafts, correspondence, and other records Dr. Penfield produced and collected in creating his various books. (W/B = Writings / Books)

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

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).

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

Subseries consists of subject files of correspondence (C/S = Correspondence/Subject). Most of these files were active up until Dr. Penfield's death and are largely grouped by subject. They may extend over a number of years but seem to indicate a continuing interest on the part of Dr. Penfield.

Subseries consists of unpublished writings, arranged by subject.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 (W/US = Writings / Unpublished by Subject)

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)