The only recorded letter sent by the British Resident Edward Gardner (1825) with the first Nepalese postmark
Edward Gardner sent this letter to his friend, the artist and writer William Fraser.

Previously, both were David Ochterlony’s assistants

On 4th March 1816 General David Ochterlony signed the “Treaty of Segauli” for the East India Company.
Subsequently, Nepal had to accept the observation of its politics by the British Residency in Kathmandu.
Edward Gardner became the first Resident after the war (1816-1829)
The earliest type of a postmark in Nepal,
in use at the British Indian P.O., affiliated to the British Residency, Kathmandu
During the Anglo-Nepalese War (1814-1816) between Nepal and the “East India Company” the British were impressed by the Gorkhali soldiers which they called Gurkhas. In the Peace Treaty (“Treaty of Segauli”) it was agreed that Gurkha soldiers could be recruited to serve under contract in the East India Company's army. David Ochterlony, who signed the “Treaty of Segauli” for the British, and his assistant William Fraser were among the first to recognize the potential of Gurkha soldiers in British service. They were incorporated into a battalion under Lieutenant Ross called the “Nasiri Regiment”. This regiment later became the “1st King George’s Own Gurkha Rifles”.

About 5.000 Gurkhas entered British service in 1815/1816. Traditionally, recruitment had been only from the Nepali hill groups such as the, Chhetri (Thakuri), Magar and Gurung. These three castes are the original Gurkhas who fought against British. Brahmin, Sherpa or Tamang were not allowed to be recruited in Gurkha army in those days. Today Gurkhas are from all tribes of Nepal including Gurung, Magar, Chhetri (Thakuri), Rai, Limbu, Sherpa, Tamang, Newars, etc.