The information is from Uwants.
A = The wooden sheds behind the straw hut constitute a temporary military hospital which had 80 beds reserved for wounded soldiers. It was built in 1860 before Britain launched their campaign in the second Opium War.The straw hut itself is staff quarter. The source is a book published in 1918 about history of British medical facilities of the army. As for those huts in the picture, it was just a guess by the commenter based on the descriptions in that book.
B=bell shaped military camps for European soldiers
C=first generation TST police station
The flat area up the hill was the training ground for 8000 soldier Sikh cavalry unit and Sikh Fane's Horse unit..
Date picture taken
1868
Shows place(s)