There is another insect, which in a similar manner made its appearance, and afterwards spread through a great part of the country, very injurious also to the crops. It is called the Hessian fly, from having been brought over, as is supposed, in some forage belonging to the Hessian troops, during the war. This insect lodges itself in different parts of the stalk, while green, and makes such rapid devastations, that a crop which appears in the best possible state will, perhaps, be totally destroyed in the course of two or three days. In Maryland, they say, that if the land is very highly manured, the Hessian fly never attacks the grain; they also say, that crops raised upon land that has been worked for a long time are much less exposed to injury from these insects than the crops raised upon new land. If this is really the case, the appearance of the Hessian fly should be considered as a circumstance rather beneficial than otherwise to the country, as it will induce the inhabitants to relinquish that ruinous practice of working the same piece of ground year after year till it is entirely worn out, and then leaving it waste, instead of taking some pains to improve it by manure. This fly is not known at present south of the Patowmac River, nor behind the Blue Ridge. [Sidenote: MEDICINAL SPRINGS.] Bottetourt County is entirely surrounded by mountains; it is also crossed by various ridges of mountains in different directions, a circumstance which renders the climate particularly agreeable. It appears to me, that there is no part of America where the climate would be more congenial to the constitution of a native of Great Britain or Ireland. The frost in winter is more regular, but not severer than commonly takes place in those islands. In summer the heat is, perhaps, somewhat greater; but there is not a night in the year that a blanket is not found very comfortable. Before ten o’clock in the morning the heat is greatest; at that hour a breeze generally springs up from the mountains, and renders the air agreeable the whole day. Fever and ague are disorders unknown here, and the air is so salubrious, that persons who come hither afflicted with it from the low country, towards the sea, get rid of it in a very short time.