1. John Thomas Howell - Botanical papers, reprints re: 1932 Crocker expedition
  2. John Thomas Howell - Botanical
  3. John Thomas Howell - General articles, publicity
  4. Findings after 1950, Allyn Smith, newspaper articles, negatives
  5. Papers, reprints, newspaper articles, 1906 logbook of Schooner "Academy", 1850 article
  6. C.A.S. 1906 expedition - pictures
  7. 1905-1906 C.A.S. expedition, Noticias de Galapagos, 1963, 1964, 1965, 1975, 1977, 1978
  8. Cocos Islands - Hertlein, Ritters, magazines
  9. John Thomas Howell - Correspondence
  10. International Scientific Project 1/21/1964, Charles Darwin Foundation
    1. Folder of field sheets