The writings of the physicians of India and of Persia were also translated into Arabic.
But close upon the crowd of translators who introduced the learning of Greece to the Arabians came original observers of the first rank, to a few only of whom time will allow me to refer.

Rhazes, so called from the name of the town (Rai) in which he was born, was educated at the great hospital at Bagdad in the second half of the ninth century.

With a true Hippocratic spirit he made many careful observations on disease, and to him we owe the first accurate account of smallpox, which he differentiated from measles.

This work was translated for the old Sydenham Society by W.A.Greenhill (1848), and the description given of the disease is well worth reading.

He was a man of strong powers of observation, good sense and excellent judgment.