"See, Holy One - the Great Road which is the backbone of all Hind. "

 

The Grand Trunk Road links the eastern and western regions of the subcontinent, running from Peshawar, across north India, into Bengal. Built several centuries ago, it is one of South Asia's oldest and longest major roads.

By hailing it as the ‘backbone of all Hind’, Kim is referring to India by the shortened form of the name Hindustan.