Hi David, The only picture I have found of a Tonga is the one from China as posted already. They saw quite some service at Diamond Hill Johannesburg, Wittenbergen and Belfast so unless they functioned as "dismounted orderlies" I am sure the Tonga was an appropriate vehicle for the terrain. They had previously been used in The Tirah which I imagine can not be less difficult terrain than in South Africa. Your pictures are of Dholies rather than Tongas of which there are far more photographs.
Looking for Salutries, Salootries and Veterinary Duffadars.
I collect primarily QSAs to Indian Recipients.