“Keep back, out of sight,” said Chick to the lineman.

The young man fell back, and Chick advanced cautiously, taking advantage of every obstruction of which he could make use.

Patsy was pursuing the same tactics on the other side of the street.

When within a few doors of Third Avenue, the woman again stopped and looked back.

This had been anticipated by Chick, too, and he was out of sight when she turned.

Nor was Patsy to be seen. The only one in the vista was a man—the lineman—and his back was turned, as if he were walking toward Irving Place.

Hastily she ran up the steps of the house in front of which she had stopped, and disappeared through the door.

Chick and Patsy both appeared at the same instant. Chick sounded a signal, and Patsy came running to him.

“Is it the house, Chick?” he asked.

“The same one, Patsy,” replied Chick.