The origins of the Lunar Society lie in a pattern of friendships that emerged in the late 1750s. Matthew Boulton and Erasmus Darwin met some time between 1757 and 1758, possibly through family connections, as Boulton's mother's family were patients of Darwin; or possibly though shared friendships, as both were admirers of the printer John Baskerville and friends of the astronomer and geologist John Michell, a regular visitor to Darwin's house in Lichfield. Darwin was a physician and poet who had studied at Cambridge and Edinburgh; Boulton had left school at fourteen and started work in his father's business making metal goods in Birmingham at the age of 21. Despite their different backgrounds they shared a common interest in experiment and invention, and their activities would show Darwin's theoretical understanding and Boulton's practical experience to be complementary. Soon they were visiting each other regularly and conducting investigations into scientific subjects such as electricity, meteorology and geology.