LEWIS, JOSEPH, Labor leader. TLS to Joseph Curran, Washington, D.C., 7 June 1940, 2 pages, 4to, on "Office of the President, United Mine Workers", stationery, authorizing Curran, President of the National Maritime Union, to attend the 1940 meeting in Mexico City of the Central Committee of the Confederation of Latin American Workers -- LEWIS. Photograph signed, n.p., n.d. Folio, 343 x 267 mm. (13½ x 10½ in.), tears at upper and lower corners, inscribed to Curran. (2)