"How did you know that?" Frank asked. "Because the water was still muddy where they had passed; it would have settled again in an hour after being disturbed, so they could not have been more than that time ahead. They were keeping just parallel with the line of march of the caravan." "How many of them do you think there were?" "Between fifty and sixty," Dick said confidently. "Perhaps they were merely journeying quietly along," Frank suggested. "Not likely," Dick replied; "they must have seen these bufflars, and would have been after them, almost to a sartinty, had they not had other business on hand. No, I expect they were watching the caravan, and had made up their minds to wait till nightfall, or perhaps till it came to some place where they can get up close without being seen, and fall upon it by surprise. We will ride back at once with the news, and put them on their guard." An hour's riding brought them to the caravan, where their news created a great sensation. Hitherto the danger from Indians had appeared a remote trouble, which might not, after all, befall them. The news that fifty or sixty of these dreaded foes were marching along, almost within sight, and might at any moment attack them, brought the danger close indeed. The waggons were driven in even closer order; the women and children were told to keep between the lines; the men distributed themselves among the teams, ready to unyoke the oxen at the shortest notice, and to form the waggons in order of defence. Abe and his companions had not yet returned; but a quarter of an hour later they were seen galloping towards the camp. "You must keep close together and look spry," Abe shouted as he approached; "we have come upon signs of a large body of Indians, a hundred and fifty or two hundred strong, I reckon, out there on the plains. They have passed along this morning, and ain't up to no good, I expect." "We have found signs of a smaller party, Abe, some fifty or sixty, on our left; these were marching straight along, pretty well in the line we are going." "Then," Abe said, "ye had best look to yer guns, for they mean mischief; they must have been watching us this morning when we started, but concluded that the ground was too level, and that we should have time to get into position before they could get up to us, besides we had all the advantage in the stockades at the station. There ain't no station this evening." "Do you think they will attack us on the road?" Frank asked.