Andrew Farquharson was a landowner and physician on the Island of Grenada. In 1795, following the outbreak of Fedon's Rebellion on the island, he was appointed a member of the seven-man emergency council aimed at enforcing British rule.

Thomas Karr received an MD from Marischal College, Aberdeen, in 1784 on the recommendation of John Gardiner and James Hamilton. He practised at Huntingdon, became an Extra-Licentiate of the Royal College of Physicians of London in 1785, and died about 1790.

John Clark was baptised in 1744 in Roxburghshire. He studied at Edinburgh University from 1760, but left without a formal qualification. Clark then became apprenticed to a surgeon in Kelso before undertaking further medical study in Edinburgh and London. In 1768 he worked as a surgeon's mate for the East India Company. This position formed the basis of the research for one of his key works 'Observations on the Diseases in Long Voyages to Hot Countries' (1773). Clark was subsequently awarded MD by St Andrews University in 1773 before establishing his practice, first in Kelso and then in Newcastle. Clark was also a prominent public health campaigner, founding the Newcastle Dispensary in 1777 and developing and promoting smallpox inoculation programmes in the city. In 1788, he joined Newcastle Infirmary and played an important role in the modernisation and redevelopment of that institution. Clark died in Bath in 1805.

William Farquharson was born in Balfour, Aberdeenshire, and earned his MD from Marischal College in 1778. Relocating to Edinburgh to practise, he was elected a Fellow of the Royal Society of Edinburgh, and a member of the Royal College of Surgeons in 1788, serving as its president in 1806. He served as a medical witness in the sensationalised fratricide trial of Alexander Gordon of Gilmerton in 1795, volunteering to keep Gordon under house arrest rather than allowing him to be imprisoned. Farquharson's younger son Francis was a respected Ophthalmic Surgeon, and his grandson Robert served as an MP for 25 years.

James Campbell, third son of John Campbell, Chief Cashier of the Royal Bank of Scotland, was born in 1756. After an MD from the University of St Andrews he joined the East India Company medical service, working as a surgeon in Calcutta (Kolkata) before becoming Apothecary General by 1803. He worked primarily as a surgeon in Calcutta, though by 1803 was Apothecary General to the Presidency of the Company. Campbell was notable for his link to the first Parliamentary divorce case brought by a woman, when his sister-in-law petitioned for divorce on the grounds that her husband and sister (James' wife) had conducted an affair. Campbell died in 1817 at Barrackpur.

Henry McLagan earned his MD from the University of Glasgow in 1784, and became a Fellow of this College in 1786. He held a practice in Culross in Fife, and disappears from the records circa 1790. There is also a Henry McLagan working in Spa, Belgium, from about 1791. However it is unclear if that is the same man, or doctor of the same name. He does not appear to be closely related to David MacLagan the future President of this College.

Robert Freer was born in Perthshire circa 1745 and received an MA from King's College, Aberdeen, in 1765. After military service he received an MD from King's College in 1779 and settled in Glasgow, becoming Regius Professor of the Practice of Medicine in 1796. He served repeatedly as physician to the Glasgow Royal Infirmary, was a Licentiate of the Royal College of Physicians of London, and President of the Faculty of Physicians and Surgeons of Glasgow from 1797 to 1800. He died in 1827.

George Tailour was educated at the University of Glasgow, earning his MD in 1768, and becoming Fellow of the Royal College of Physicians of Edinburgh in 1771. He was likely born in St Christopher (now St Kitts and Nevis), and spent 15 years practising medicine there. His son John was also a physician, earning his MD from the University of Edinburgh in 1776 and serving in the East India Company army. George Tailour died in 1777 and is buried in Greyfriars Kirkyard.

Martin Eccles had a long and varied career. The son of Dr William Eccles, who would later become President of the College, he was apprenticed to the surgeon-apothecary Robert Hope, father of President John Hope. After completing his apprenticeship, he opened his own apothecary on Niddry's Wynd, Edinburgh. In 1742 Eccles' shop was destroyed by rioters after the discovery of a 'resurrected' body, though Eccles and his apprentices avoided conviction for body snatching. In 1753, Eccles was awarded an MD from the University of St Andrews and began to style himself as a doctor. However, while keeping an apothecary's shop and being unlicensed by the College, he was prosecuted for impersonating a physician. By 1771 Eccles became a Fellow of the College before he died in October 1778 aged 76.

William Buchan was born at Ancrum in 1729. He entered the University of Edinburgh in 1749, later practising in Yorkshire and serving as physician to the Foundling Hospital at Ackworth. His most famous work, 'Domestic Medicine', was published in 1769 and enjoyed wide circulation. Buchan moved to London in 1778, published further works, and died there on 25 February 1805. He is buried in Westminster Abbey.