of the causes above alluded to, it is believed that that evidence is found in the report made by Capt. Delafield, who inspected the repairs of this road made by Mr. Giesey. By pursuing the course suggested in your letter, it is believed that these objections and difficulties would still obtain, and that in a little time, however faithfully the repairs might be made on the top of the large stones, the road would be in as bad order as it is at present, since the great cause of these evils would remain, viz.: that of having the bed which supports the stones, and which in fact should be the real support of the traffic on the road, lower than the neighboring ground. It is the intention of the department that the defects of the first construction of the road shall be remedied in its repair, and as it is believed that the adoption, as nearly as practicable, of the Macadam system, in all its important features, presents the only means of effecting this remedy, and as this system forms the basis of your instructions, it is recommended that they be departed from as little as possible. It is by no means the intention of the department to take from you all discretion in the discharge of your duties; such a course would defeat the object had in view in sending an officer of engineers on the road; but it is believed to be highly important that the exercise of this discretion should be limited to an extent that will insure the adoption of such principles and rules as cannot fail to render these repairs permanent. For these principles and rules, you are referred to Mr. Macadam's work on the construction and repairs of roads, a copy of which is in your possession. In removing the metal from the old road, whenever hollows present themselves in the old bed, it is recommended that they be filled with earth; indeed, the whole bed of the road should be elevated, and its form given to it, before any of the covering of stone be replaced. The earth necessary for this may be taken from the ditches, or even from the sides of the road, where it can be done without encroaching upon the privileges of persons residing on the road. I am, &c., &c., C. GRATIOT. Lt. J. K. F. Mansfield, Corps of Engineers, Uniontown, Pa. EXTRACTS FROM NOTICES FOR CONTRACTS. PLAN OF REPAIRS.