[Adler, Alfred Charles] (1863-1934); [Adler, George Martin] (1860-after 1920); [Moulton, George Henry] (1860-1921). Extensive Archive of Forty Original Documents (Twenty Original Autograph Letters Signed, with Two Original Envelopes, Five Typewritten Letters Signed, Nine Mimeographed Letters and Manuscripts, Six Printed Letters or Leaflets) and an Original Gelatin Silver Photo, Related to the Foundation and Early Activities of “La Victoria and El Triunfo Rubber Plantation,” Established by Massachusetts Entrepreneurs in La Paz, near the Pacific Coast of Nicaragua. Ca. 1901-1908.