The man ahead was walking rapidly, but the two lads gained on him. After two blocks' walking they were less than fifty yards in the rear—slouching along cautiously, with heads lowered, for they did not wish to be recognized if the man were really Davis.
Once the man turned and gazed at the two figures behind him; then, apparently satisfied that he was not being followed, he moved on again.
After two more blocks he doubled around a corner. Frank and Jack turned the corner a moment later, just in time to see Davis mount a short flight of steps, open a door and enter the house.
Frank and Jack walked by, taking careful note of the number of the house, however, and without glancing up again, continued down the street and turned the next corner.
There they halted as of one mind while Frank peeped around the corner, remarking:
"Don't want him to trick us. I don't think he knew he was being followed, but you never can tell."
The lads stood there for perhaps ten minutes; then Jack reached a decision.
"As long as we have come this far," he said, "we may as well finish this man hunt. We'll go and have a look for him."
"How do you figure we are going to get into the house?" demanded Frank. "Or do you just plan to ring the bell and ask for 'Mr. Davis'?"
"We'll have to get in some way," returned Jack, "or else admit that we are wrong."