122 REVENUE SURVEYS. 



In consequence of the growth of the capital, a re-survey of 

 Calcutta had become necessary, the former plan, executed in 1847, 

 by Mr. F. "W. Simms, C.E., having been on too small a scale, and 

 having since become quite out of date. In 1851 a survey of the 

 boundary of holdings was commenced by Mr. "W. Heysham, whose 

 work lasted four years, and who converted Mr. Simms's topographical 

 maps into maps showing the holdings, with index numbers referring 

 to a register of owners and areas. These, however, in process of 

 time, had become useless through changes in proprietorship, but a 

 newer and more correct set of registers had been begun in 1877. 



The " Calcutta Survey Act, 1887," became law on the 15th 

 January in that year. The Deputy Superintendent in charge of the 

 operations was empowered to inquire into and lay down boundaries. 

 The scale adopted was 50 feet to 1 inch, surface features being 

 shown with the greatest minuteness, and the underground lines of 

 sewers, gas, and water pipes being subsequently added. There has 

 been a great deal of delay caused by the failure of proprietors to 

 attend when their boundaries were being laid down, and there is 

 still a good deal of work remaining to be done, including the house 

 to house inquiry as to names of proprietors and boundaries of 

 buildings, and the drawing of the fair sheets. The principal field work 

 has been completed, but owing to the great difficulty in getting 

 proprietors to attend, when the boundaries are being laid down, it is 

 almost impossible to say when the last sheet will be published. 



Bombay. — Owing to the famine the operations in 187G-77 of Major 

 H. C. B. Tanner's party in the Poona and Satara districts had to be 

 diverted to a part of the country which was quite unprepared for 

 survey, and where no triangulation had been done in advance, and 

 this resulted in a smaller out-turn than usual. The nature of the 

 survey was, as before, topographical, on the scale of two inches to a 

 mile, based on triangulation and traverse. The levels and charts 

 carried out by the irrigation officers were incorporated into the 

 survey sheets, and all the heights were connected with those brought 

 up from the coast by Captain Baird's Tidal and Levelling party, so 

 that the true heights above mean sea-level were ascertained in each 

 case. Every effort was made to utilise the maps of the Bombay 

 Government Revenue Surveys, but as the work in this year happened 

 to lie in hilly ground, where these maps were found to be, as a rule, 



