 Most of his free time was spent lobbying the East India Company for better equipment and studying the methods used by the Ordnance Survey; he frequently corresponded with Thomas Frederick Colby.In June 1830, Everest returned to India to continue his work on the GTS, and was simultaneously appointed Surveyor General of India.The arc from Cape Commorin to the northern border of British India was finally completed in 1841, under the supervision of Andrew Scott Waugh.