some one who knew the river, to avoid sandbars and snags, and the captain was the only person on board who had this knowledge. But whether by day or by night, as I was the only negro in the boat, I "was made to stand at least three tricks (white men are very fond of such tricks) to any other person's one; so that, from being much with the captain, and frequently thrown upon my own exertions, I learned the art of steering and managing the boat far better than the rest. I watched the manœuvres necessary to shoot by a sawyer, to land on a bank, or avoid a snag, or a steamboat, in the rapid current of the Mississippi, till I could do it as well as the captain. After a while he was attacked by a disease of the eyes; they became very much inflamed and swollen. He was soon rendered totally blind, and unable to perform his share of duty. This disorder is not an unfrequent consequence of exposure to the light of the sun, doubled in intensity as it is by the reflection from the river. I was the person who could best take his place, and I was in fact master of the
