Joseph Rock spent some time in Daili in the early 1920s as evidenced by the pictures that I will publish here over the next few days.
Here's a couople of now and then pictures:
My pictures were taken in 1990.
Kham then and now. A photoblog showing how eastern Tibet looked in the 1920s and how the same places and people look now. Based on the explorations of botanist Joseph Rock.