"What is it, Bab? Are you certain?" demanded Grace, springing to her feet.
"Oh, I can't tell you now! Let's get Mr. Stevens, can't we?"
"Mr. A. Bubble!" cried Ruth, and flew from the room.
The girls rushed pell-mell for the car, dragging Miss Stuart with them, none knowing what Bab had in mind, but all eager and excited. Ruth drove at top speed, and the girls burst in on Bob Stevens whom they found in his shop.
"See this!" cried Bab, holding the bit of paper out to the young man. "Put it against the window." He did so wonderingly, then turned and looked at the girls. "What did you see?" demanded Bab impatiently.
Bob had seen a line drawn from the top of a toadstool extending to the right. At the end of the line was the sign "60".
"What do those little marks after the sixty mean?" demanded Bab.
"On building plans they would mean inches. Expressing time, they would indicate seconds."
"You have it! If we face the woods and start to measure from the top of the 'toadstool,' that undoubtedly represents the mound under which lies the big chief, and measure off 'sixty seconds' which means sixty inches, or five feet, we'll find the treasure."
No one stopped to question the probability of Barbara's deductions. Bob summoned a man who worked for him, sent a boy to get two more from Treasureholme, and, taking picks, shovels, and a coil of rope, drove off with the girls in Mr. A. Bubble as fast as they could go to the Indian burying ground. It was nearly dark when they reached there and sprang from the car, neither Bab nor Bob waiting for it to come to a full stop.