“But that’s stealing, Mary Lou! He could have us arrested.”

“Detectives have to take chances like that. It isn’t really stealing, for we want to get hold of it merely to give its contents to the rightful owner. Of course, if there’s no money in it, we could return it later.”

They were silent for a while, listening to the pounding of the engine. Fifteen minutes passed; Mary Louise saw by her watch when they rode under a light that it was quarter after nine, and she recalled her promise to her mother. But she couldn’t do anything about it now.

They were ascending a hill, and the speed of the car was diminishing; it seemed to the girls that they were not going to make it. The engine wheezed and puffed, but the driver was evidently doing his best. Ahead, on the left, shone the lights of a gas station, and this, Mary Louise decided, must be the goal that Harry was now aiming for.

But the engine refused to go the full distance: it sputtered and died, and the girls felt the car jerked close to the right side, with no sign of civilization about except the lighted gas station about fifty yards ahead.

But, lonely or not, the time had come for action, and there was not a second to be lost. Before Harry Grant’s feet were off the running board both girls were out of the car on the other side, holding Silky close to them and hiding in the shadow.

Mr. Grant stepped forward and raised the hood of his motor, peering inside with a flashlight. Keeping her eye on him through the open window of the car, Mary Louise crept cautiously along the right side towards the front.

The young man turned about suddenly and swore softly to himself. But it was not because he had seen or heard the girls, although Jane did not wait to find that out. Desperately frightened, she dashed wildly into the protecting darkness of the bushes at the side of the road.

Mary Louise, however, remained steadfastly where she was, waiting for her opportunity.

It came in another moment. Lighting a cigarette, Mr. Grant started to walk to the gas station.