Onesimus (Bostonian) dating history

Details

Enquiring of my Negro-man Onesimus, who is a pretty Intelligent Fellow, Whether he ever had the Small-Pox; he answered, both, Yes, and No; and then told me, that he had undergone an Operation, which had given him something of the Small-Pox, and would forever preserve him from it, adding that it was often used among the Guramantese, & whoever had the Courage to use it, was forever free from the Fear of the Contagion. He described the Operation to me, and showed me in his Arm the Scar.