Vlil PRELIMINARY NOTICE. 



either case the correct spelling of the word would undoubtedly be 

 Panchet, the n being nasal and only slightly sounded. This spelling 

 has, of course, been adopted. Numerous other cases might be cited, 

 showing how easy it would be to arrive at, and fix, once for all, the 

 true spelling of the ordinary names of places, and how easy it would 

 then be to transliterate these names according to any fixed system. 

 An attempt has been made in the accompanying map to do this uni- 

 formly on the system adopted by the Trigonometrical Survey of India, 

 and thus to avoid the confusion of names which arises from the use 

 of two totally different, and in many respects opposing systems, by the 

 two authorized Survey establishments of the country. In the present 

 case, this does not interfere with any official maps, as none such exist, 

 excepting for a small portion of the eastern end of the field. 



A few remarks have been added to Mr. Blanford's report, supple- 

 mentary to the paper already published in the second volume of these 

 Memoirs, on the Geological age of these Indian rocks. 



I gladly take this opportunity of offering publicly the best thanks of 

 the Geological Survey to the Proprietors of the several collieries, their 

 Agents in the field, and Secretaries, for the kindly aid which they 

 afforded during the progress of the examination of this field. For a 

 considerable portion of the valuable information detailed herein, the 

 Geological Survey is indebted to them. 



T. Oldham. 



Calcutta, June 1861. 



