[2] The Society's wide appeal in the 18th century, the possession of a valuable library (originally purchased from Sims) and freehold property (donated by Lettsom) helped to ensure the society's success at that time.

This early 19th-century building was originally owned by the Earl of Gainsborough, and is now also home to several related societies who share the facilities.

The Fothergillian gold medal,[6] named in honour of physician John Fothergill, Lettsom's patron, is awarded every three years in consultation with the Royal College of Physicians (to be awarded every five years from 2010).

The present prize, founded in 1824, is funded by the will of Anthony Fothergill and prior to 1888 was awarded annually.

Source: Source (1787–1902):[citation needed] After the somewhat autocratic 22-year presidency of James Sims, a motion was passed in 1805 that: "No gentlemen be eligible to the office of President or Vice-president for more than two years in succession.