It was a thrilling moment. That view, so cunningly masked by the belt of forest, was one of the finest views imaginable. It was a first-class river. It flowed in the bottom of a valley at least six hundred feet deep, and no more than half a mile across from rim to rim. From the opposite rim, the prairie rolled on to the horizon. It was not so much a valley as a deep, clean gash in the prairie. The side upon which they stood was mantled with the deep green of spruce, while the other side rolled up in fantastic knobs and terraces of buffalo grass.

The river poured a smooth, yellowish green flood through the bottom of this mighty trough; just the color of poplar bark. It was broken by several high islands, covered with spruce trees, which stemmed the current like majestic ships. The point upon which they stood was on the outside of a great bend, and they could look far up-stream, where the river seemed to flatten out, and to issue dazzling and molten from the afternoon sun itself.

Conacher’s first thought was: “Plenty of water! I’ll be able to make a raft. We’ll have some easy days now.”

They gazed at the noble prospect with full hearts. Conacher in particular was bursting with pride. He felt like the creator of that river, because they had found it where he had said it would be.

“We happen to have hit it just right,” he said with a transparent air of carelessness. “In years to come when there is a trail it will strike the river here. Above here, you see, it flows east of north, and at this point it swings around to the westward. That agrees with the Indian reports. It is the only river east of the Rockies that has a westward trend.”

“It is too beautiful to be called the Mud River,” said Loseis.

“After this it shall be Laurentia’s River.”

“Suppose there are rapids,” suggested the matter-of-fact Mary-Lou.

“It will probably flow smooth for two hundred miles,” said Conacher. “Then it will strike the limestone outcrop that crosses the whole country. We’ll find rapids, maybe cascades, there.”

“And we are the first whites to see it!” murmured Loseis.