John Stevens Henslow was an English Anglican priest, botanist and geologist. He was a friend and mentor to his pupil Charles Darwin. In the summer of 1831 Henslow was offered a place as naturalist to sail aboard HMS Beagle to survey South America, but his wife dissuaded him from accepting. Seeing a perfect opportunity for his protégé, Henslow wrote to the ship's captain Robert Fitzroy telling him that Darwin was the ideal man to join the expedition team
Frederick William Hope was an English clergyman, naturalist, collector and entomologist, who founded a professorship at the University of Oxford to which he gave his entire collection of insects in 1849 (the Hope Entomological Collections, with around 3.5 million specimens). He described numerous species and was a founder of the Entomological Society of London in 1833. He was a founder members of the Zoological Society of London. Hope collaborated with many naturalists of the period, including Charles Darwin