properly João Rodriguez, a learned Hebrew physician of the sixteenth century. Concealing his religion, he studied at Salamanca, and long lived in Italy, where he was called to attend Pope Julius III., about the middle of that century. The fear of the Inquisition drove him to Thessalonica, where he openly professed the Jewish religion. His remarks on Dioscorides show him to have been skilled in Greek and Arabic; and his Latin work on practical medicine contains many curious observations. He was born in Portugal in 1511, and died at Thessalonica (Saloniki) in 1568.