more pleasant outside. Let's look for that tunnel."
But the lads soon realized that it was not going to be as easy to locate this as they had hoped. They were looking for some sort of slanting opening, going down into the earth—the entrance to the underground city—but though they both made a complete circuit of the temple, each at a varying distance from the outer walls, no tunnel entrance showed.
"Breakfust! Breakfust!" called Eradicate, when Tom was about to start on a second round.
"Let's eat," suggested Ned, "and then we four can circle around together." Tom agreed that this would be a good plan. A little later then, with Tom nearest the temple walls, the four began their match around them.
Four times that morning they made the circuit, and the same number in the afternoon, until they were nearly half a mile away from the ruin, but no tunnel showed.
"Well, we'll have to keep at it to-morrow," suggested Tom. "It's too soon to give up."
But the morrow brought no better success, nor did the following two days. In fact for a week they kept up the search for the tunnel, but did not come upon it, and they had now pretty well
