And 25,000 spades and picks are at work, under such a Field-Engineer as there is not in the world when he takes to that employment. At all hours, night and day, 25,000 of them: half the Army asleep, other half digging, wheeling, shovelling; plying their utmost, and constant as Time himself: these, in three days, will do a great deal of spade-work. Batteries, redoubts, big and little; spare not for digging. Here is ground for Cavalry, too; post them here, there, to bivouac in readiness, should our Batteries be unfortunate. Long Trenches there are, and also short; Batteries commanding every ingate, and under them are Mines: "We will blow you and our Batteries both into the air, in case of capture!" think the Prussians, the common men at least, if Friedrich do not. "Mines, and that of being blown into the air," says Tempelhof, "are always very terrible to the common man." In places there are "Trenches 16 feet broad, by 16 deep," says an admiring Archenholtz, who was in it: "and we have two of those FLATTERMINEN (scatter-mines," blowing-up apparatuses) "to each battery." [Archenholtz, ii. 262 &c.] "Bunzelwitz, Jauernik, Tschechen and Peterwitz, all fortified," continues Archenholtz; "Wurben, in the centre, is like a citadel, looking down upon Striegau Water. Heavy cannon, plenty of them, we have brought from Schweidnitz: we have 460 pieces of cannon in all and 182 mines. Wurben, our citadel and centre, is about five miles from Schweidnitz. Our intrenchments"--You already heard what gulfs some of them were!" Before the lines are palisades, storm-posts, the things we call Spanish Horse (CHEVAUX-DE-FRISE);--woods we have in abundance in our Circuit, and axes busy for carpentries of that kind. There are four intrenched knolls; 24 big batteries, capable of playing beautifully, all like pieces in a concert." Four knolls elaborately intrenched, clothed with cannon; founded upon FLATTER-mines: try where you will to enter, such torrents of death-shot will converge on you, and a concert of 24 big batteries begin their music!--