“ The district is served by the Dun canals. Tea gardens cover a considerable area, and the valley contains a colony of European tea planters.
History.—Dehra Dun only emerges from the mists of legend into authentic history in the 17th century A.D., when it formed part of the Garhwal kingdom. Towards the end of the century the heretical Sikh Guru, Ram Rai, expelled from the Punjab, sought refuge in the Dun and gathered round him a crowd of devotees. ”

“ Along the central ridge, the water-level lies at a great depth from the surface (228 ft.) , but it rises gradually as the country declines towards the great rivers. In 1901 the population was 178,195, showing an increase of 6% in the decade. ”