"What's yon that follows at my side?-- The foe that ye must fight, my lord,-- That hirples swift as I can ride?-- The shadow of the night, my lord."

--_Kipling._

On that still summer morning the battle-lines stood ready for the death-grip. The Turks were drawn up in a long crescent, whose tips overlapped the Tatar wings, one of which touched the river and the other an entrenched hill fifteen miles away across the plain.

"Never in all my life have I sought another's advice in war," said Bayazid, "but you rode with Timour six years. Will he come to me?"

Donald shook his head. "You outnumber his host. He will never fling his riders against the solid ranks of your janizaries. He will stand afar off and overwhelm you with flights of arrows. You must go to him."

"Can I charge his horse with my infantry?" snarled Bayazid. "Yet you speak wise words. I must hurl my horse against his--and Allah knows his is the better cavalry."

"His right wing is the weaker," said Donald, a sinister light burning in his eyes. "Mass your strongest horsemen on your left wing, charge and shatter that part of the Tatar host; then let your left wing close in, assailing the main battle of the Amir on the flank, while your janizaries advance from the front. Before the charge the spahis on your right wing may make a feint at the lines, to draw Timour's attention."

Bayazid looked silently at the Gael. Donald had suffered as much as the rest on that fearful march. His mail was white with dust, his lips blackened, his throat caked with thirst.

"So let it be," said Bayazid. "Prince Suleiman shall command the left wing, with the Serbian horse and my own heavy cavalry, supported by the Kalmucks. We will stake all on one charge!"

And so they took up their positions, and no one noticed a flat-faced Kalmuck steal out of the Turkish lines and ride for Timour's camp, flogging his stocky pony like mad. On the left wing was massed the powerful Serbian cavalry and the Turkish heavy horse, with the bow-armed Kalmucks behind. At the head of these rode Donald, for they had clamored for the Frank to lead them against their kin. Bayazid did not intend to match bow-fire with the Tatars, but to drive home a charge that would shatter Timour's lines before the Amir could further out-maneuver him. The Turkish right wing consisted of the spahis; the center of the janizaries and Serbian foot with Peter Lazarus, under the personal command of the Sultan.

Timour had no infantry. He sat with his bodyguard on a hillock behind the lines. Nur ad-Din commanded the right wing of the riders of high Asia, Ak Boga the left, Prince Muhammad the center. With the center were the elephants in their leather trappings, with their battle-towers and archers. Their awesome trumpeting was the only sound along the widespread steel-clad Tatar lines as the Turks came on with a thunder of cymbals and kettle-drums.

Like a thunderbolt Suleiman launched his squadrons at the Tatar right wing. They ran full into a terrible blast of arrows, but grimly they swept on, and the Tatar ranks reeled to the shock. Suleiman, cutting a heron-plumed chieftain out of his saddle, shouted in exultation, but even as he did so, behind him rose a guttural roar, "_Ghar! ghar! ghar!_ Smite, brothers, for the lord Timour!"

With a sob of rage he turned and saw his horsemen going down in windrows beneath the arrows of the Kalmucks. And in his ear he heard Donald MacDeesa laughing like a madman.

"Traitor!" screamed the Turk. "This is your work----"

The claymore flashed in the sun and Prince Suleiman rolled headless from his saddle.

"One stroke for Nicopolis!" yelled the maddened Highlander. "Drive home your shafts, dog-brothers!"

The stocky Kalmucks yelped like wolves in reply, wheeling away to avoid the simitars of the desperate Turks, and driving their deadly arrows into the milling ranks at close range. They had endured much from their masters; now was the hour of reckoning. And now the Tatar right wing drove home with a roar; and caught before and behind, the Turkish cavalry buckled and crumpled, whole troops breaking away in headlong flight. At one stroke had been swept away Bayazid's chance to crush his enemy's formation.

As the charge had begun, the Turkish right wing had advanced with a great blare of trumpets and roll of drums, and in the midst of its feint, had been caught by the sudden unexpected charge of the Tatar left. Ak Boga had swept through the light spahis, and losing his head momentarily in the lust of slaughter, he drove them flying before him until pursued and pursuers vanished over the slopes in the distance.

Timour sent Prince Muhammad with a reserve squadron to support the left wing and bring it back, while Nur ad-Din, sweeping aside the remnants of Bayazid's cavalry, swung in a pivot-like movement and thundered against the locked ranks of the janizaries. They held like a wall of iron, and Ak Boga, galloping back from his pursuit of the spahis, smote them on the other flank. And now Timour himself mounted his war-steed, and the center rolled like an iron wave against the staggering Turks. And now the real death-grip came to be.

Charge after charge crashed on those serried ranks, surging on and rolling back like onsweeping and receding waves. In clouds of fire-shot dust the janizaries stood unshaken, thrusting with reddened spears, smiting with dripping ax and notched simitar. The wild riders swept in like blasting whirlwinds, raking the ranks with the storms of their arrows as they drew and loosed too swiftly for the eye to follow, rushing headlong into the press, screaming and hacking like madmen as their simitars sheared through buckler, helmet and skull. And the Turks beat them back, overthrowing horse and rider; hacked them down and trampled them under, treading their own dead under foot to close the ranks, until both hosts trod on a carpet of the slain and the hoofs of the Tatar steeds splashed blood at every leap.

Repeated charges tore the Turkish host apart at last, and all over the plain the fight raged on, where clumps of spearmen stood back to back, slaying and dying beneath the arrows and simitars of the riders from the steppes. Through the clouds of rising dust stalked the elephants trumpeting like Doom, while the archers on their backs rained down blasts of arrows and sheets of fire that withered men in their mail like burnt grain.

All day Bayazid had fought grimly on foot at the head of his men. At his side fell King Peter, pierced by a score of arrows. With a thousand of his janizaries the Sultan held the highest hill upon the plain, and through the blazing hell of that long afternoon he held it still, while his men died beside him. In a hurricane of splintering spears, lashing axes and ripping simitars, the Sultan's warriors held the victorious Tatars to a gasping deadlock. And then Donald MacDeesa, on foot, eyes glaring like a mad dog's, rushed headlong through the mêlée and smote the Sultan with such hate-driven fury that the crested helmet shattered beneath the claymore's whistling edge and Bayazid fell like a dead man. And over the weary groups of blood-stained defenders rolled the dark tide, and the kettle-drums of the Tatars thundered victory.