[4] The aim of his mission was to spread the Christian faith among a largely Hindu and Muslim population in Herbertpur and surrounding areas as well as to provide medical care and treatment at extremely cheap or no cost to the villagers.
[1] Lehmann specialized in ophthalmology and tropical medicine, but carried out a wide range of surgical and consultation treatments in the Herbertpur Hospital.
[5] His family resided on a farm near Sherwood in Nottinghamshire, where they raised chickens, ducks, turkeys, cows and more animals.
[5] Growing up, Lehmann was a member of England's Children's Special Service Mission, a youth evangelism group also referred to as CSSM.
As a young boy, Lehmann believed in the Christian doctrine, but he did not like that parents tend to over-shelter their children from the world.
[1] He then trained in medicine from Liverpool University Medical School and travelled to the US to intern at the Manhattan Eye, Ear and Throat Hospital to study with Dr. Chester Mayo.
They had become good friends, but Lehmann initially had no thought of marrying Monica, as she wanted to one day return to India as a missionary.
Dr. Lehmann also worked with the Evangelical Alliance Mission and served as the chairman on board of governors for the Wynberg Allen School.
At one point, even the District Magistrate told Lehmann that they would close down his hospital if he continued to preach about Christianity, as he was considered to be taking advantage of those who needed medical help.
[5] However, Lehmann believed that paying attention to people's souls was just as important as healing them physically, and took a liking to the title "Missionary Medic."
Dr. Geoffrey Lehmann's life and work were the subject of The Himalayan Heartbeat, a book written by Ken Anderson, which was published in 1965.