The "dead line" formed a complete circuit parallel to the inside of the stockade and about twenty feet therefrom. It consisted of a narrow strip of board nailed to a row of stakes, which were about four feet high. "Shoot any prisoner who touches the "dead line" was the standing order to the guards. Several companies from Georgia regiments were detailed for the duty, and their muskets were loaded with "buck and ball" (_i. e._, a large bullet and two buckshot). The day guard at the stockade consisted of one hundred and eighty-six men; the day reserve of eighty-six men. The night reserve consisted of one hundred and ten men; the outlay pickets of thirty-eight men. A sick prisoner inadvertently placing his hand on the dead line for support, or one who was "moon blind" running against it, or anyone touching it with suicidal intent, would be instantly shot at, the scattering balls usually striking others than the one aimed at. The intervening space between the wall and the dead line was overgrown with weeds, and was occasionally tested by workmen with long drills to ascertain the existence of tunnels. In attempting to escape by this means the prisoners endeavored to emerge at night some distance from the stockade and take to the woods. To frustrate such attempts, which would inevitably be discovered at roll-call the following morning, man-tracking hounds were led by mounted men on a wide circuit around the prison, with the well-nigh universal result that the trail was struck and the fugitive taken. Later a stockade was erected parallel to the first, and some ten or twelve rods beyond. Tunnels could not be carried so far with the means available. They were dug with knives and the dirt was taken out in haversacks or bags drawn in and out by a cord. The work of digging was usually carried on at night. During the day a sick man lay over the tunnel's mouth in a tent or under a blanket. That the roll-call sergeant might not discover the fresh earth, it was sifted early in the morning from the pocket and down the trouser leg of a comrade, who walked unconcernedly about. The little grains of earth which he dropped were soon trodden under foot.