The smoke increased every moment. Now it curled over the whole mountain top. It was not possible that so much smoke could come from a charcoal kiln. There must be a conflagration of some sort, for many birds flew over to the nearest ridge. Hawks, grouse, and other birds, who were so small that it was impossible to recognize them at such a distance, fled from the fire.

The tiny white spiral of smoke grew to a thick white cloud which rolled over the edge of the ridge and sank toward the valley. Sparks and flakes of soot shot up from the clouds, and here and there one could see a red flame in the smoke. A big fire was raging over there, but what was burning? Surely there was no large farm hidden in the forest.

The source of such a fire must be more than a farm. Now the smoke came not only from the ridge, but from the valley below it, which the boy could not see, because the next ridge obstructed his view. Great clouds of smoke ascended; the forest itself was burning!

It was difficult for him to grasp the idea that the fresh, green pines could burn. If it really were the forest that was burning, perhaps the fire might spread all the way over to him. It seemed improbable; but he wished the eagle would soon return. It would be best to be away from this. The mere smell of the smoke which he drew in with every breath was a torture.

All at once he heard a terrible crackling and sputtering. It came from the ridge nearest him. There, on the highest point, stood a tall pine like the one in which he sat. A moment before it had been a gorgeous red in the morning light. Now all the needles flashed, and the pine caught fire. Never before had it looked so beautiful! But this was the last time it could exhibit any beauty, for the pine was the first tree on the ridge to burn. It was impossible to tell how the flames had reached it. Had the fire flown on red wings, or crawled along the ground like a snake? It was not easy to say, but there it was at all events. The great pine burned like a birch stem.

Ah, look! Now smoke curled up in many places on the ridge. The forest fire was both bird and snake. It could fly in the air over wide stretches, or steal along the ground. The whole ridge was ablaze!

There was a hasty flight of birds that circled up through the smoke like big flakes of soot. They flew across the valley and came to the ridge where the boy sat. A horned owl perched beside him, and on a branch just above him a hen hawk alighted. These would have been dangerous neighbours at any other time, but now they did not even glance in his direction—only stared at the fire. Probably they could not make out what was wrong with the forest. A marten ran up the pine to the tip of a branch, and looked at the burning heights. Close beside the marten sat a squirrel, but they did not appear to notice each other.

Now the fire came rushing down the slope, hissing and roaring like a tornado. Through the smoke one could see the flames dart from tree to tree. Before a branch caught fire it was first enveloped in a thin veil of smoke, then all the needles grew red at one time, and it began to crackle and blaze.

In the glen below ran a little brook, bordered by elms and small birches. It appeared as if the flames would halt there. Leafy trees are not so ready to take fire as fir trees. The fire did pause as if before a gate that could stop it. It glowed and crackled and tried to leap across the brook to the pine woods on the other side, but could not reach them.

For a short time the fire was thus restrained, then it shot a long flame over to the large, dry pine that stood on the slope, and this was soon ablaze. The fire had crossed the brook! The heat was so intense that every tree on the mountain was ready to burn. With the roar and rush of the maddest storm and the wildest torrent the forest fire flew over to the ridge.