service, and staff horses; sixth, infantry regiments that had not seen service; and the following were ordinarily refused transportation, although the positive rule was laid down that nothing necessary for military service was to be refused transportation if such was available-batteries, except in cases of emergency, were to march; cavalry was to march; mules and wagon-horses were to be driven; wagons, ambulances, and other vehicles were to be hauled over the common roads.
In addition to the regular duties of construction, repair, and operation of the railroads, the construction corps did valiant service in securing information of the Confederates
and also of Pope
's army, which for a time was cut off from communication with the Federal
Their telegraph operators would go as far forward as possible, climb trees, reconnoiter the country, and send back by wire all the information they could gather.
As soon as the Confederates
had withdrawn from the vicinity of Manassas
, the corps promptly began repairing road-beds, tracks, and bridges.
's army was soon resupplied and the intense feeling of apprehension allayed.
In the latter part of 1862, W. W. Wright
, an assistant in the work of the corps, was placed in charge of the Cumberland
Valley Railroad, which was wholly under military supervision.
Later in the war, Wright
was in charge of Sherman
's railroads during the great Atlanta campaign
For his guidance with the Cumberland
road the instructions were: First, not to allow supplies to be forwarded to the advanced terminus until they were actually required; second, only such quantities were to be forwarded as could be promptly removed; third, cars must be promptly unloaded and returned; fourth, to permit no delay of trains beyond the time of starting, but to furnish extras when necessary.
's corps evacuated Fredericksburg
upon the withdrawal of the Federal
forces from the Rappahannock
line before the second Bull Run
campaign, all the reconstructed work at Aquia Creek
and some of the bridges on the