The cloud-bank came on in black and yellow masses, and the saffron light I recalled so well turned the living green of the forest to a sickly pallor and the yellow river to a tinge scarce to be matched on earth.  Xavier had the tiller now, and the men were straining at the oars to send the boat across the current towards the nearer western shore.  And as my glance took in the scale of things, the miles of bluff frowning above the bottom, the river that seemed now like a lake of lava gently boiling, and the wilderness of the western shore that reached beyond the ken of man, I could not but shudder to think of the conflict of nature’s forces in such a place.  A grim stillness reigned over all, broken only now and again by a sharp command from Xavier.  The men were rowing for their lives, the sweat glistening on their red faces.

“She come,” said Xavier.

I looked, not to the northeast whence the banks of cloud had risen, but to the southwest, and it seemed as though a little speck was there against the hurrying film of cloud.  We were drawing near the forest line, where a little creek made an indentation.  I listened, and from afar came a sound like the strumming of low notes on a guitar, and sad.  The terrified scream of a panther broke the silence of the forest, and then the other distant note grew stronger, and stronger yet, and rose to a high hum like unto no sound on this earth, and mingled with it now was a lashing like water falling from a great height.  We grounded, and Xavier, seizing a great tow-rope, leaped into the shallow water and passed the bight around a trunk.  I cried out to Nick, but my voice was drowned.  He seized me and flung me under the cabin’s lee, and then above the fearful note of the storm came cracklings like gunshots of great trees snapping at their trunk.  We saw the forest wall burst out—­how far away I know not—­and the air was filled as with a flock of giant birds, and boughs crashed on the roof of the cabin and tore the water in the darkness.  How long we lay clutching each other in terror on the rocking boat I may not say, but when the veil first lifted there was the river like an angry sea, and limitless, the wind in its fury whipping the foam from the crests and bearing it off into space.  And presently, as we stared, the note lowered and the wind was gone again, and there was the water tossing foolishly, and we lay safe amidst the green wreckage of the forest as by a miracle.

It was Nick who moved first.  With white face he climbed to the roof of the cabin and idly seizing the great limb that lay there tried to move it.  Xavier, who lay on his face on the bank, rose to a sitting posture and crossed himself.  Beyond me crowded the four members of the crew, unhurt.  Then we heard Xavier’s voice, in French, thanking the Blessed Virgin for our escape.

Further speech was gone from us, for men do not talk after such a matter.  We laid hold of the tree across the cabin and, straining, flung it over into the water.  A great drop of rain hit me on the forehead, and there came a silver-gray downpour that blotted out the scene and drove us down below.  And then, from somewhere in the depths of the dark cabin, came a sound to make a man’s blood run cold.