Series contains information pertaining to the Linnea Lodge No. 76 of the International Order of the Good Templars of the Province of British Columbia. Records include a roll book and constitution, a membership book, regalia, and what appears to be an account book.

Series contains material pertaining to the Scandinavian Central Committee, located in Vancouver. The records include Seaholm's personal research and notes, meeting minutes, news bulletins, photographs, and news clippings.

During the 1960s, Seaholm received a grant from the New Horizon program to write a history about Swedish immigration to Canada. Although he never finished writing a book about this topic, this collection contains much of his research related to this ambition. The collection consists of correspondence, reports, minute books, newspaper and magazine issues and clippings, periodicals, books pertaining to Sweden and/or Swedish immigrant history, and research material about Swedish activities in North America. The series also contains a photograph collection of the Swedish community in British Columbia.

The series contains eight subseries: General research material; Photo collection; "They left something behind" collection; Book Collection; Swedish Pioneer Historical Quarterly periodicals; The Bridge (Brggyan in Swedish); Swedish Press Publishing Company; and Newspaper clippings and miscellaneous articles.

Series contains research material Seaholm collected or created on the Swedish Canadian Rest Home located in Burnaby BC. Records include handwritten notes, newspaper clippings, and copies of reports. The photographs are of the Rest Home.