There were others leading from the cars in the rear.

Noting these, Whitey said: "Mebbe they held up the passengers, too.

It's likely that they would." But, singularly enough, most of these tracks led on toward the high bridge which spanned the gully.

The boys followed them curiously, and when they reached the bridge Injun stopped.
"Huh! Go back again, too," he muttered.

And sure enough in the maze of footprints many seemed to lead back toward the water tank.
"Why do you s'pose they went to the bridge?
Prob'ly to see if it was safe; that the robbers hadn't damaged it," Whitey said.
"Mebbe," said Injun, who was figuring things out in his own way and seldom spoke until he had them figured.
From the scramble of footprints near the tank, Injun picked out those of three pairs that diverged from the mass.