"Presents the material from volumes 1,2 and 4 of the original set of 1839 and excludes the well-known text of Darwin's journal" -- p.xxxiii.
v. 1. Proceedings of the first expedition, 1826-1830, under the command of Captain Phillip Parker King, part I
v. 2. Proceedings of the first expedition, 1826-1830, under the command of Captain Phillip Parker King, part II ; Appendices to the first voyage
v. 3. Proceedings of the second expedition, 1831-1836, under the command of Captain Robert Fitzroy, part I
v. 4. Proceedings of the second expedition, 1831-1836, under the command of Captain Robert Fitzroy, part II ; Appendices to the second voyage.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
The narrative of the Beagle voyage, 1831-1836. ISBN 9781851968442. Published by Pickering & Chatto in 2012. Publication and catalogue information, links to buy online and reader comments.
