Cambridge Monographs in Experimental Biology Number 3. 163 pages plus a list of scientific names of the species mentioned, references, and an index. The book includes discussion of field observation, experimental studies of navigation, homing experiments, theories of navigation, field tests of these theories and anatomical, physiological and neurophysiological factors. Signature of author to title page. Condition: Dust jacket soiled and worn, as well as being twice price clipped, but book clean, sound and unmarked. A little wear to the top of spine, and a bookplate (of Jeffery Boswall, naturalist and broadcaster) to front pastedown.