She slipped into the house quickly, her heart beating in her throat.

"I'll try this," said Harry.

"Wait here." He left Joan within a few feet of the stoop, went up the two steps, and not finding a bell, knocked on the screen door.

In less than an instant he saw the girl with bobbed hair come forward.

"I'm sorry to trouble you," he said, with a little bow, "I thought Mr.Gray might live here," and turned to go.