The definitive Wikipedia entry for Joseph Dalton Hooker. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Joseph_Dalton_Hooker
In 1841, while Joseph was yet traveling , his father was appointed director of kew.This was glad event for the Hookers , for they had always hoped that Kew could be a public garden. www.orchids.co.in/orchidologists/joseph-dalton-hooker.shtm
Website of the Darwin Correspondence Project. The Darwin Correspondence Project exists to publish the definitive edition of letters to and from Charles Darwin, the most influential naturalist of the 19th century. www.darwinproject.ac.uk/