after the first two years, a different route from that of my friend, an account of my separate travels and experiences seems not an inappropriate offering to the public.
When I first arrived in England, being much depressed in health and spirits after eleven years' residence within four degrees of the equator, the last three of which were spent in the wild country 1400 miles from the sea-coast, I saw little prospect of ever giving my narrative to the world; and indeed, after two years had elapsed, had almost abandoned the intention of doing so. At that date I became acquainted with Mr. Darwin, who, having formed a flattering opinion of my ability for the task, strongly urged me to write a book, and reminded me of it months afterwards, when, after having made a commencement, my half-formed resolution began to give way. Under this encouragement the arduous task is at length accomplished. It seems necessary to make this statement, as it explains why so long a time has intervened between my arrival in England and the publication of my book.
The collections that I made during the whole eleven years were sent, at intervals of a few months, to London for distribution, except a set of species reserved for my own study, which remained with me, and always accompanied me in my longer excursions. With the exception of a few living plants and specimens in illustration of
