The fonds consists of research files for Cassidy's private consulting work, with some material by colleagues and students from the Centre for Public Sector Studies mixed in. The records are primarily photocopies of studies and submission by First Nations bands and organizations, government documents and reports, journal articles, brochures, and clippings. Many have been originally marked as attachments, but some of the number sequences are no longer complete. There are very few original records of Cassidy's in the files.

The fonds is comprised of botanical illustrations and field journals by Oluna Ceska, with additional information contributed by Adolf Ceska. This includes, eight field journals of mycofloristic (mushroom) surveys with detailed illustrations by Oluna Ceska. Each specimen has been labelled by name, as well as by the location, date, and substrate where it was found. Additional observations include physical characteristics, smell, size, and spore size. The research focuses primarily on the southern Vancouver island region. Many of the studied specimens are from Observatory Hill, Victoria. Additional research locations include the Gulf Islands, Haida Gwaii, the BC mainland, the Yukon, Washington, and Oregon.

The fonds also consists of 9 survey reports of macrofungi on Observatory Hill that were researched and compiled by Oluna, with photos of specimens taken by Adolf. The reports describe species of fungi that were found, their location, as well as environmental factors that impact fungi growth.

In addition to the notebooks and reports relating to mushrooms, the fonds includes illustrations of flora on Southern Vancouver Island.

The fonds reflects the development of Harrison's career as a painter following 28 years as a teacher, and consists of the following series: Harrison Family and Personal; Accounting; Teaching; Art Works; Production; Harrison Appearances; Publishing; Projects; Galleries; Photography; and Miscellaneous Objects.