Each cadet took hold of mane, bridle and saddle in the way prescribed and stood with left foot in stirrup.

"Mount!"

Jauntily each man swung up, pa.s.sing his right leg over his mounts back, then settling easily into saddle.

For the first few minutes the squad walked, trotted, cantered and galloped around the tanbark in single file. Then their instructor, riding always near the center of the floor, threw them into platoon front at the west end of the hall. Now he gave them some general instruction as to the nature of the evolutions they were to perform.

The next command came by bugle, and the platoon broke into column of fours, moving forward at the trot, Captain Alb.u.t.t riding at the left flank near the head of the column.

As the horses fell into column of fours Haynes saw his chance.

Nearly always, in this formation, some of the horses b.u.mp their neighbors. Haynes, by a slight twist of the bridle, threw horse over against Prescott's. The thing was so natural as to attract no notice.

Just as the horses touched flanks, however, Haynes, with his right foot swiftly withdrawn from its stirrup-box, gave Satan a vicious jab with the pin-point protruding from the toe of his boot.

There was a wild snort. Satan seemed instantly bent on proving the appropriateness of his name.

Lowering his head, Satan kicked out viciously with his hind feet, throwing the horses just behind into confusion.

Almost in the same instant Satan bit the rump of a horse in front of him.

Then up reared Prescotts mount.

d.i.c.k was a good horseman, but this move had caught him unawares.

A horse at a trot is not usually hard to manage, and Prescott had not been on his guard against any such trick.

By the time that Satan came down from his plunge d.i.c.k had a firm seat and a strong hand on the bridle. But Satan was a tough-mouthed animal. His unlooked-for antics had caused the horses just ahead to swerve.

Through the scattering four in front plunged Satan, fire in his eyes, his nostrils quivering.

Captain Alb.u.t.t took the situation in at once.

"Squad halt!" he roared. Be cool, Mr. Prescott! Bring your mount down with tact, not brute force.

Satan, having taken the bit between his teeth, went tearing around the tan-bark, not in the least minding the tight hold that his rider had on the bridle, or the way that the bit cut into his mouth. Satan blamed his own rider for that sharp, stinging jab, and he meant to unseat that rider.

d.i.c.k kept perfectly cool, though he realized much of his own great peril with this infuriated beast.

Captain Alb.u.t.t, watching closely, became anxious when he saw that the cadet was failing in bringing down the temper of the infuriated beast.

Satan was more than furious; he was crafty. Master of many tricks, and with a record for injuring many a rider in the past, the animal dashed about the tan-bark, seeking some way of throwing his rider.

His uneasiness increasing, Captain Alb.u.t.t put spurs to his own mount and went after Satan.

"Steady, Mr. Prescott," admonished the cavalry officer, riding close. I'll soon have a hand on your bridle, too.

Yet every time that Captain Alb.u.t.t rode close, Satan waited until just the right instant, then swerved violently, s.n.a.t.c.hing his head away from the risk of capture.

So villainous were these swerves that d.i.c.k had several narrow escapes from being unhorsed. A man of less skill would have been.

At first the other members of the squad looked on only with amused interest. When, however, they caught the grave look on the captain's face, they began to comprehend how serious the situation was.

Satan, finding other devices for throwing his rider to be useless, soon resorted to the most wicked trick known to the equine mind.

He reared, intent on throwing himself over backward, crushing his rider beneath him.

Captain Alb.u.t.t reached the spot at a gallop, just in the nick of time. Standing in his stirrups, he caught one side of the bridle just in time to pull the horse's head down.

But, foiled in this attempt, Satan allowed his front feet to come down. Close to the ground the brute lowered its head, kicking up high with his hind heels. This, accompanied by a "worming"

motion, sent Prescott flying from his saddle.

He made an unavoidable plunge over the animal's head.

"Let go your bridle!" roared Captain Alb.u.t.t.

In the same instant the cavalry officer leaped from his own saddle.

Over came Cadet Prescott, turning a somersault in the air.

Alb.u.t.t had jumped in order to catch the cadet. It all happened so quickly, however, that the cavalry officer had chance only to catch the cadets shoulders. Had it not been for that, Prescott would have struck fully on his back.

Having thrown its rider, Satan cantered off to the far end of the riding hall, where he stood, snorting defiance.

Captain Alb.u.t.t allowed Prescott's head and shoulders to sink easily to the tan-bark.

"Are you badly hurt, Mr. Prescott?" inquired the officer.

"The small of my back is paining me just a little sir, from the wrench," replied Prescott coolly. "If it hadn't been for you, sir, my neck would have been broken."

"I think it would," replied the cavalry officer, smiling. "But this is one of the things I am here for. Do you feel as if you could rise, Mr. Prescott, with my help?"

"I'd like to try, sir."

d.i.c.k did try, but watchful Captain Alb.u.t.t soon let him down again.

"You may not be much hurt, Mr. Prescott, but I want one of the medical officers to take the responsibility for saying so. Just lie where you are until we get a medical officer here. Mr. Haynes, pa.s.s your lines to the man at your left and run to the telephone.

Ask for a medical officer and two hospital corps men with a stretcher."

The turnback leaped quickly to obey. This gave him the coveted chance to get away by himself, where he could secretly remove from his boot the little black pin that had been responsible for this excitement.

Surgeon and hospital men came on the run. The surgeon declined to make an examination there, but directed his men to lift the injured cadet to the stretcher and take him to the hospital.

In the meantime some enlisted men had caught and quieted Satan, leading him from the tanbark.

"That brute never will be used again, if I have my way," muttered Captain Alb.u.t.t, loudly enough to be heard by most of the cadets of the squad.

Then the drill proceeded as though nothing had happened.

"I fixed my man that time, and easily enough," growled Haynes to himself. "He's out of the service, from now on. He can nurse a weak back the rest of his days."

When the drill was dismissed a party of three ladies, who had seen the whole scene from one of the iron balconies, came down to meet the cavalry officer.