A biography for Joseph Dalton Hookerhasn’t been written yet.
“I was aware of Darwin's views fourteen years before I adopted them and I have done so solely and entirely from an independent study of the plants themselves.[Letter to W.H. Harvey]”
“I expect to think that I would rather be author of your book [The Origin of Species] than of any other on Nat. Hist. Science.[Letter to Charles Darwin 12 Dec 1859]”