attending physicians, spoke of these cases as malignant fever. Soon after these cases occurred, Snyder, an engineer, at work on a steam-boat, at the same wharf, died with violent symptoms of fever, after an illness of five days. Plank, who attended Snyder, and employed at the same place, and a Dutch servant boy, who lived in the house where Snyder died, were a few days after taken with like symptoms of fever, and died on the third or fourth day. All these cases, were, by the attending physicians, (now dead) declared cases of yellow fever, and it is in evidence to the committee that they died with _black vomit_. Snyder died on the 7th August, and Plank on the 9th, several other cases occurred about the same time among the workmen, at one of the new wharves, and terminated fatally, after a short illness. At the two wharves mentioned, the first unequivocal cases of the yellow fever made their appearance, and about the same time, other cases occurred, which terminated fatally, with persons usually about the stores, near the wharves and river, about the same period. A young man of the name of Carson died on the 26th August, after an illness of 48 hours, with unequivocal symptoms of yellow fever, he occupied a store near the river and the wharves. Ellsworth died on the 5th September, after an illness of about 48 hours, and 17 days after the arrival of the sloop Patriot, from the Havanna, in which he came passenger from that place. He also occupied a store near the river and wharves.