JDH is making arrangements for trip to the snow. Rajah of Sikkim has given permission as a result of pressure from [Archibald] Campbell & Lord Dalhousie. JDH details negotiations that led to permission to travel. Rajah of Nepal much more accommodating of JDH's travel plans. Describes audience with the Dhurma Rajah, his appearance, dress, & behaviour & that of his entourage including the Vakeel & Tibetan Seneschal, Bhotea [Bhotia] attendants, JDH's Nepalese guards [Gurkhas] & their Havildar or 'Corporal' of the Kawass tribe, the Lepcha servants, Bhootanese [Bhuntanese] subjects of Sikkim & Bhutan, & a few Musselmen [Muslims] & Hindoos [Hindus], Mrs Campbell & her children. Though JDH does not consider many of the party trustworthy he does not fear for his own safety once they start to march. He hopes his expedition into Sikkim will pave the way for others to follow with less suspicion. JDH will be careful only to take observations, e.g. with barometer, in his tent so he does not alarm his guard. They are suspicious that his every action will lead to their country being taken, but he plans to charm them & will soon have them collecting for him. The Rajah has provided a guide. JDH explains his route will go North past Kinchin [Kanchenjunga] to a village called Jongri then West to the border of Nepal & beyond to the Kangliachem pass leading to Tihibet [Tibet]. Achieving this will realize Hooker's great ambition as a botanist & traveller. He will be gone 30 days & will take any opportunity to send letters. In getting permission to travel he has defied the expectation of Lord Auckland, [Hugh] Falconer, [Brian Houghton] Hodgson & Sir Herbert Maddock. Many tried to help get him permission but did not think he would succeed. Mrs Campbell has kindly provided him with supplies & provisions. JDH asks WJH not to publicise his planned trip though he may share news from his letters with Bentham, Harvey, Berkeley et cetera & asks that this letter be forwarded to Darwin.