“Lives and Letters of Eminent Persons,” by John Aubrey, 1813.

“Records of William Harvey, with Notes,” by James Paget, of St. Bartholomew’s Hospital, 1846.

“The Works of William Harvey,” translated by Robert Willis, M.D. (Sydenham Society, 1848). This excellent translation has been followed in the present volume.

“Histoire de la Découverte de la Circulation du Sang,” par M. J. P. Flourens, 1854.

“Circulation of the Blood: its History, Cause, and Course,” by G. H. Lewes in “Physiology of Common Life,” 1859.

“Memorials of Harvey,” collected by J. H. Aveling, 1875.

“William Harvey: a history, etc.,” by Robert Willis, M.D., 1878.

“Roll of the Royal College of Physicians,” by William Munk, M.D., 2nd ed., 1878.

Huxley on “Evolution,” in “Encyclopædia Britannica,” 9th ed., 1878.

“Experimental Physiology,” by Sir R. Owen, 1882.