A sudden thought struck Peggy, and she turned to the farmer.
"Did any of those bills have an identifying mark on it?" she asked.
The farmer shook his head. But Mrs. Galloway had a better memory.
"Why, yes, Ike," she exclaimed; "that twenty-dollar-bill you got frum Si. Giddens fer ther Baldwins. I re'klect thet it hed a big round O in red ink marked on ther back uv it. It was a bit rubbed out, an' hard ter see, but ef you knew it wuz thar an' luked fer it, you could see it plain enough."
After inquiring about the baby, whose thankful mother declared it to be as well as ever, Roy and Jimsy dragged out the Golden Butterfly and boarded it. It had been arranged that the two girls were to spin back to town in the car, the aeroplane following them as closely as possible from above.
As they chugged out of the farm-yard gate and on to the rough road, Peggy's thoughts kept time to the rhythmic pulsations of the motor:
"A-twenty-dollar-bill-with-a-red-round-O. A-twenty-dollar-bill-with-a-red-round-O."