The concentrated tincture of yellow Peruvian bark : prepared by George Brown, chemist, at no. 79, St. Paul's Church Yard : a certain cure for the intermittents, and very useful in all complaints which require large doses of the bark.

Leaflet advertising George Brown's febrifuge tincture of yellow peruvian bark for intermittent fever, first sold in 1793. includes testimonials from doctors Babington, Relph, Murray, Saunders, Hervey and O' Ryan and a short list of stockists in London.