Captain Canot by Brantz Mayer

I was a close watcher of Mongo John whenever he engaged in the purchase of slaves. As each negro was brought before him, Ormond examined the subject, without regard to sex, from head to foot. A careful manipulation of the chief muscles, joints, arm-pits and groins was made, to assure soundness. The mouth, too, was inspected, and if a tooth was missing, it was noted as a defect liable to deduction. Eyes, voice, lungs, fingers and toes were not forgotten; so that when the negro passed from the Mongo's hands without censure, he might have been readily adopted as a good "life" by an insurance company.

Upon one occasion, to my great astonishment, I saw a stout and apparently powerful man discarded by Ormond as utterly worthless. His full muscles and sleek skin, to my unpractised eye, denoted the height of robust health. Still, I was told that he had been medicated for the market with bloating drugs, and sweated with powder and lemon-juice to impart a gloss to his skin. Ormond remarked that these jockey-tricks are as common in Africa as among horse-dealers in Christian lands; and desiring me to feel the negro's pulse, I immediately detected disease or excessive excitement. In a few days I found the poor wretch, abandoned by his owner, a paralyzed wreck in the hut of a villager at Bangalang.