Observations on the superior efficacy of the red Peruvian bark : in the cure of agues and other fevers. Interspersed with occasional remarks on the treatment of other diseases by the same remedy. And an appendix, containing a more particular account of its natural history. By William Saunders, M.D. F.R.S. Member of the Royal College of Physicians in London, and physician to Guy's Hospital. [One line in Latin from Horace].