Separately maintained by the firm, the subseries contains legal case files for unions whose use of the firm was not extensive. Material generally comprises investigative documents for legal matters and printed material for single cases, including briefs and other printed matter. Additionally, subseries incudes files for cases not directly connected to the firm, such as Cannery and Agricultural Workers Industrial Union (1933-1937). Their case was handled by Leo Gallagher who later became a partner of Katz, Gallagher and Margolis, a firm of labor and civil rights attorneys in Los Angeles with close ties to Leonard's firm.