This subsubseries consists of materials relating to Lombardi's translations of various works by the pioneer German sexologist Magnus Hirschfeld (1868-1935). Lombardi initially translated works by Hirschfeld that concerned Ulrichs; later, at the instigation of Vern Bullough and Prometheus Books, he undertook translations of two of Hirschfeld's major works, Die Transvestiten (1910) and Die Homosexualität des Mannes und des Weibes (1914). The materials in the subsubseries include finished translations of two of Hirschfeld's writings on Ulrichs, work papers for Lombardi's translation of Die Transvestiten, and a photocopy of Die Homosexualität des Mannes und des Weibes.