Jenny was quite ready to leave, but Duke was more reluctant. However, on started the Pike's Peak Limited again.

"We'll stop for breakfast when we're at a safer distance," quoth Harry. "Hope we reach water tonight."

Yes, the great herd was perceptibly nearer when they pulled out. But at the rate it was moving it could be left behind while it peacefully grazed. The thin brush was a-sparkle with scant dew, soon dried by the bright sun. The hoof-prints of the second horseman party showed plainly in the sod and sandy gravel. Terry acted as guide, Harry, following with the cart, urged on Duke and Jenny.

"Reckon we'll come to another stake today," called back Terry.

"Reckon we will," answered Harry.

The rumble of the herd gradually died. The sun mounted higher, and Terry was thinking upon breakfast, when a sudden hail from Harry halted him.

"Wait! Listen!"

Harry had stopped.

"Whoa!" And Duke and Jenny stopped, not at all unwillingly.

Terry stopped, poised. Another dull rumble! More buffalo? Nothing was in sight before or on either hand. The rumble came from behind—and yonder, against the sun, welled a cloud of dust.