He knew it, but he guessed what Tebaldo would do, and he kept his horse at full speed as the road began to wind upward to the black lands. He glanced behind him just before each turning, expecting to see his pursuer. But a clear start of four minutes meant a mile, at the pace he had ridden out of the town. He kept the horse to it, for he was riding for the wager of his life. But the animal had been put to it too suddenly after his feed, without as much as a preliminary walk or trot to the foot of the hill, and even in his terror Francesco saw that it would be impossible to keep the pace much longer. But he could save distance, if he must slacken speed, if he followed the footpath by which the peasants had made short cuts between each bend of the road and the next. They were hard and safe in the heat, and his horse could trot along them fairly well, and even canter here and there. And then, when he was forced to take the high-road for a few hundred yards, he could break once more into a stretching gallop. If he could but reach that turn, just beyond the high hill, where Ferdinando's friend had once waited for San Giacinto, he believed that he could elude Tebaldo in the black lands.

It was a terrible half-hour, and he gasped and sweated with fear, as he urged his horse up that last long stretch of the road which could not be avoided. His heart beat with the hoof-falls, and the sweat ran down upon his velvet coat, while he felt his hands so cold that it was an effort not to drop the reins. But the beast had got his wind at last, and galloped steadily up the hill.

It was growing suddenly dark, and there was a feverish yellow light in the hot air. A vast thunderstorm was rolling over Etna, and another had risen to meet it from the west, hiding the lowering sun. Only overhead the air was calm and clear. The first clap of the thunder broke in the distance, and went rolling and echoing away from the volcano to the inland mountains. As he reached the top of the hill, Francesco felt the big drops of rain in his face like a refreshment, though they were warm. The thunder pealed out again from the mountain's side with a deafening explosion. He turned in his saddle and looked back.

The road was straight and long, and he could see far. Tebaldo was in sight at last, almost lying on the mare's bare back as she breasted the hills, his hand along her neck, his voice near her ear while she stretched her long brown body out at every stride.

Francesco's teeth chattered as he spurred his horse for another wild effort. He could break from the road now, just before the wide curve it made to the left, and he knew the bridle-paths and all the short cuts and byways through the black lands, as few men knew them except that one man, his brother, who was behind him. In his haste to escape he had left his rifle in Basili's hall. It was so much the less weight for his horse to carry, but it left him defenceless, and he knew that Tebaldo must be armed.

The storm broke and the rain came down in torrents. His horse almost slipped in jumping the ditch to get off the main road, but recovered himself cleverly, and long before Tebaldo had reached the top of the hill Francesco was out of sight. He might have felt safe then, from almost any other pursuer. But he knew Tebaldo, and now and then his teeth chattered. He told himself that he was chilled by the drenching rain, but in his heart he knew it was fear. Death was behind him, gaining on him, overtaking him, and he felt a terrible weakness in all his bones, as though they were softened and limp like a skeleton made of ropes.

It was hard to think, and yet he had to ease his mind. Tebaldo was lighter than he, and he rode without saddle or bridle. To take the shortest way through the black lands was to be surely overtaken in the long run. It might be best to take the longest, and perhaps Tebaldo might get before him, and give him a chance to turn back to Randazzo.

But as he looked down at the path his heart sank. The heavy rain had already softened the ground in places and his horse's hoofs made fresh tracks. There was no mistaking them. There was only one way, then, and it must be a race, for only speed could save him. Whichever way he might turn in and out of the fissures and little hollows, he must leave a trail in the wet, black ashes, which anyone could follow.

Don Taddeo's best horse was one of the best horses in that part of the country, as Francesco knew, and more than a match for the notary's brown mare, had other things been alike. But there was the difference of weight against him, and, moreover, Tebaldo was the better rider.

There was less than three-quarters of a mile between them now, but if he could keep the pace, that would do. He followed the shortest path, which was also the best, because it was naturally the one most used by travellers. The rain fell in torrents, and the air was dusky and lurid. Again and again the great forked lightnings flashed down the side of the mountain, and almost at the instant the terrible thunder crashed through the hissing rain. Francesco felt as though each peal struck him bodily in the back, between the shoulders, and his knees shook with terror as he tried to press them to the saddle, and he bent down as if to avoid a shot or a blow, while his ears strained unnaturally for the dreaded sound of hoofs behind. Yet he scarcely dared to turn and look back, lest while he looked his horse might hesitate, or turn aside to another path through the black wilderness. Under the lurid light the yellow spurge had a horribly vivid glow, growing everywhere in big bunches among the black stones and out of the blacker soil. It almost dazzled him, as he rode on, always watching the path lest he should make a mistake and be lost.