The march is instantly halted.  The mass, moving in a column, is deployed—­that is, stretched out to cover a mile or more as it moves forward; the cavalry divides and rides far to right and left, to see that no ambush is set to enable the rebels to sneak in behind the vast human broom, as it sweeps through the solemn aisles of the pines, now rising in vernal columns thicker and thicker.  The firing is going on now in scattering volleys, and soon the wounded—­a dozen or more—­are carried back through the silent ranks.  Joking has now ceased.  Lips are compressed; eyes glitter, and the men avoid meeting each other’s gaze.  It is the moment of all moments, the most trying to the soldier, when he is expecting every instant a hurricane of bullets, and yet sees no one to avenge his anguish on or forestall in the deadly work.  But they have been moving forward all the time, the hurtling bullets sweeping through the leafy covering, now and then thumping into the soft pine with a vicious joyousness, as if to say to each man, “The next is for you, see how well our work is done.”  For these hideous missiles have a language of their own, as every man that stood fire can tell.  The skirmishers are now all drawn in.  The solid line must do the work at hand.  No one but the commander and his confidants knew the work intended, save that to kill and be killed was the business to be done.  The panting lines are on high cleared ground now, and they can see absolutely nothing but the irregular depressions that mark the channel of the Bull Run, as it rushes down to the Rappahannock.  The line is moving along steadily.  Looking to left and right, Jack can see the colors of three regiments, and his eye rests with pleasure on the bright, shining folds of the Caribees’ dark-blue State flag spread to the breeze beside the stars of the Union.  Are they to cross the river?  Evidently, for the command is still “Forward, bear center, bear right.”  Then, square in front, where the thick, broad leaves of the oak glitter in the sun, there is seen a cylinder of steam-like smoke, with fiery gleams at the end, a crackling explosion of a hogshead of fire-crackers, then a rushing, screaming sound in their very faces, then a few rods behind a ringing, vicious explosion.  They are in the very teeth of a masked battery.  The Union skirmishers have been withdrawn too soon.  The main line will be torn to pieces, for retreat is as fatal as advance.

“Lie down, men!” The command rings out and is echoed along the column.  The guns have the range, and the enemy knows the ground.  The Caribees are directly in the sweep of the artillery, and the command comes to them by company to crawl backward, exposing themselves as little as may be.  Presently two brass guns are brought up behind the Caribees.  The gunners have noted the point of the enemy’s fire.  The men point the big muzzles with intrepid equanimity, firing over the prostrate blue coats.  For twenty minutes, perhaps half an hour, this is kept up; then there is silence on