Mentions letters from Peacock and Henslow; tells of offer of a position on surveying voyage, his initial refusal, and eventual acceptance. Describes FitzRoy and course of voyage.

Thanks CTW for his letter [125]. "I do not think I ever received a more kind letter than yours or one that gave me so much pleasure.— You ought to have in your mind, the prospect of leaving England for 3 or 4 years before you can understand how to enjoy such a letter from such a person as yourself—". Regarding the voyage, "all is finally settled, & I have sealed away about half a chance of life.— If one lived merely to see how long one could spin out life,—I should repent my choice.— As it is I do not.—"

Thanks CTW for four fungi which have arrived.