Columbia subject headings:
Beagle Expedition (1831-1836)
Darwin, Charles, 1809-1882.
Naturalists--England--Biography.
Naturalists--England--Correspondence.
Harvard subject headings:
Princeton subject headings:
Beagle Expedition (1831-1836)
Darwin, Charles, 1809-1882.
Naturalists--England--Biography.
Naturalists--England--Correspondence.