I most sincerely and tenderly deplore the unfortunate situation of our city. What do people say now of the origin of the disease? You may state, for the information of those who wished to be informed, that not a single vessel, on board of which a person has been sick with fever of any kind, or on board of which any person has died with any disease, while in the West-Indies, or on the voyage home, has ever gone up to the city during this whole season. This we know, and this we vouch for; and farther state, that all the cases of fever that have come down as from the city, have been _all_ people of, and belonging to the city, and unconnected with the shipping, excepting one, a sailor, who had no connection with any foul vessel. There is not a shadow of proof or suspicion that can attach to the health-office, or to infected vessels, this season. I am, &c. JOHN R. B. RODGERS. Having concluded the history of the bilious yellow fever, as it has appeared in eleven successive years, since 1793, as an epidemic, or in sporadic cases, I shall proceed next to enumerate all the sources of that fever, as well as all the other usual forms of the summer and autumnal disease of the United States, and afterwards mention the means of preventing them. AN INQUIRY INTO THE VARIOUS SOURCES OF THE USUAL FORMS OF _SUMMER & AUTUMNAL DISEASE_ IN THE UNITED STATES, AND THE MEANS OF PREVENTING THEM. The business of the following inquiry is, I. To enumerate the various sources of the usual forms of the summer and autumnal disease in the United States. And, II. To mention the means of preventing them. To render the application of those means as extensive as possible, it will be proper to mention, under the first head, all those sources of summer and autumnal disease, which have been known to produce it in other countries, as well as in the United States. They are, 1. Exhalations from marshes. These are supposed to be partly of a vegetable, and partly of an animal nature. They are derived from the shores of creeks and mill ponds, as well as from low and wet grounds; also from the following vegetable substances in a state of putrefaction. 2. Cabbage. A malignant fever was produced at Oxford, by a putrid heap of this vegetable some years ago, which proved fatal to many of the inhabitants, and to several of the students of the university at that place. 3. Potatoes. Nearly a whole ship's crew perished at Tortola, by removing from her hold, a quantity of putrid potatoes. 4. Pepper. 5. Indian meal. 6. Onions. 7. Mint. 8. Anise and caraway seeds, confined in the hold of a ship.