Before they left England FitzRoy gave Darwin a copy of the first volume of Charles Lyell's Principles of Geology, a book the captain had read that explained terrestrial features as the outcome of a gradual process taking place over extremely long periods.

Before they left England FitzRoy gave Darwin a copy of the first volume of Charles Lyell's Principles of Geology, the subject which would be his primary work.

0.005 seconds.