Viljo Rosvall and Janne Voutilainen, while working to organize lumber workers with the Lumber Workers Industrial Union of Canada (LWIUC) at Onion Lake, disappeared in November 1929 and were later found dead. These deaths have been contested: many believe that they were killed for their work in the labour movement, while the official inquest stated their deaths were accidental and due to drowning.

This collection of records includes academic and popular articles related to the deaths of Rosvall and Voutilainen, and materials related to their grave site and memorials. The most significant item here is an affidavit made by Arthur Alanko to Ernie Epp and Paul Pugh: he states that while visiting Finland in 1990 he was given information about men who had killed Rosvall and Voutilainen and then returned to Finland. This information is new to the story as generally understood and told as part of Thunder Bay's popularly understood history.

Records relating to Steve Mantis's work in injured workers' rights and advocacy, including with: Thunder Bay District Injured Workers Support Group; Ontario Network of Injured Workers Groups; and the Worker's Compensation Board (WSIB). Records of research projects. New Directions Speakers' School. Poverty reduction initiatives. Bay Credit Union Social Responsibility Committee. Run for MPP in 2011 Ontario election as NDP candidate for Thunder Bay-Superior North.

While records are divided into series by organization/association, it will be clear to readers that the work of many of these organizations overlaps and interconnects. Mantis's role was often as a connector, building synergy and solidarity between organizations.