From the Richmond Dispatch, 5/5/1862, p. 3
Sappers and Miners
We understand Captain N. Carroll is under orders to proceed forthwith in command of his company of sappers and miners, consisting of 100 men, composed of engineers and mechanics or the blockading of the river James, and other works of importance. This move on the part of the Government, directly under the superintendence of Capt. Carroll, (who is known to be an engineer of the greatest experience in the United States and Europe) will prove advantageous to Richmond, and to the Southern Confederacy.