Lambton worked on the survey till he died of tuberculosis, in the field, in 1823. His crumbling grave was recently rediscovered by the writer John Keay in the village of Hinganghat, fifty miles south of Nagpur. His theodolite is in better condition and is now housed in the Survey of India headquarters in Dehradun.
Lambton- mapping of India - Nagpur - Dehradun
