I had an wonderful experience two days back at Archives Department at Gangtok. I came across a personal file of Stephen Smith about how he proposed his Sikkim Rocketmail Experiment of 1935. The files contains letters and the process of his permission to the small kingdom of Sikkim. Right now i am going through it and those letters are really interesting to read.
In one instance, after the Sikkim Rocketmail Experiment 1935, Stephen Smith had send three photographs of the event to Chogyal Sir Tashi Namgyal, the King of Sikkim but with some unknown reason those three photographs was returned back to Stephen Smith. There is a letter in the file from an American stamp collector asking the Chogyal about the items of Sikkim Rocketmail to which the Chogyal had directed to talk straightly to Stephen Smith.