810 Memoir of Sylhet, Kachar, ^ adjacent Districts, [No. 104. 



carried far enough to fix the courses of the great streams and ridges, 

 and to establish a relation with the route pursued by Captain Pem- 

 berton from Manipur into Assam, the great ridge crossed by him being 

 in this survey traced westward to its termination in a number of 

 ramifications on the Modura river. The fact of most interest ascer- 

 tained by this part of the survey, is the facility with which a road 

 could be formed from the navigable limit of the Jotingah to that of 

 the Di-yung, by which the intercourse with Upper Assam would be 

 greatly extended, and its communication with Calcutta shortened. So 

 gentle is the ascent, and so few are the obstacles, that there seems 

 no reason to doubt, a road for carts might be made with very little 

 trouble. 



Returning westward, the survey fixes the boundaries of Jynta, and 

 much of the mountain tract immediately north of Sylhet and Pondua, 

 including the country between Chirra Ponji and Nunklao. It i\^ 

 traces the outline of Sylhet at the foot of the Kasia Hills, and is 

 prolonged to Sowara, on the banks of the Brahmaputra, from which it 

 follows the old channel of this river to Naraingunj and Dacca. The 

 object of this last portion of the work was to connect the survey and 

 a series of astronomical observations made for longitude at the town 

 of Sylhet, with a position which had been well fixed by Mr. Walter 

 Ewer of the Civil Service, and to which the Assam Survey had also 

 been referred. For many of these observations, which were made on 

 the transit of the moon and stars, I was so fortunate as to obtain cor- 

 responding passages at Greenwich. Dacca was included also as a well 

 fixed point, but chiefly because the water communication between 

 it and Sylhet, was found to be very erroneously delineated in the old 

 maps, in consequence apparently of changes in the course of the rivers 

 below Azmerigunj. Correct outlines were made of these, though they 

 do not appear in the new printed map, for which it is to be supposed 

 they were too late. 



The minute operations carried on in the prosecution of the Revenue 

 Survey have afforded an opportunity for acquiring a more intimate 

 knowledge of the topography, resources, and husbandry of the interi- 

 or, and these complete the list of the several inquiries pursued. 



Aspect and Geology. — The physical aspect of this vast tract, presents 

 great variety, and cannot of course be described under one term. 



