Journal kept by David Douglas during his travels in North America, 1823-1827 : together with a particular description of thirty-three species of American oaks and eighteen species of Pinus.
Diario mantenido por David Douglas durante sus viajes en América del Norte, 1823-1827.
- New York, Antiquarian Press, 1959.
- 364 p. illus., port. 26 cm.
Sketch of a journey to north-west America, 1924-1927 (p. 51-76, see p. 54-55 for Galápagos)
Botany--North America. Oak. Pine.
North America--Description and travel. Northwest, Pacific--Description and travel.