The Life of Edward Jenner M.D. Vol. 2 (1838) by John Baron, p. 447
Edward Jenner: Frasi in inglese
The Life of Edward Jenner: With Illustrations of His Doctrines, and Selections from His Correspondence https://books.google.com.mx/books?id=7K9iwCjoUgkC&printsec=frontcover#v=onepage&q&f=false, Vol. 2 (1838), by John Baron, p. 295
The Life of Edward Jenner M.D. Vol. 2 (1838) by John Baron, p. 447