observant eye. But on the cross-road no dark green auto was in
sight.

As they came to the first street on the right, however, a solitary
car met their eager eyes.

Polly looked her delight, as the swept round the corner and along
the hard, clear stretch. The flicker of a smile was on the
Colonel's rugged face.

"Doc-tor! Doctor Dud-ley!" called Polly.

The physician turned his head.

"Oh, don't stop!" she entreated, for he was slowing up, as they
came alongside.

"Please go right back--quick! David's worse!"

One astonished glance, and he comprehended, and obeyed. Colonel
Gresham gave him room for the turn. Then, with a graceful gesture
of farewell, and, "I thank you!" he whizzed past them and out of
sight.

"Oh, I hope he'll get there in time!" sighed Polly.

"I think he will," the Colonel nodded. "He looks it."

"I don't want David to die; he's such a nice boy."