Frank Mansfield sprang out into the dark hall, calling the detective's name.
There was no reply.
The outer door stood open, the dark outlines of Trinity Church appeared beyond, but Detective Cutts was nowhere to be seen.
With one bound Frank Mansfield leaped toward that open door.
"Stop!" cried a stern voice. "Young man, what are you doing here?"
And the form of a large and powerful man was interposed before him, who seized the boy by the arm.
"This way, men!" he cried, as three policemen came running down Rector street from Broadway. "Here's one of the rascals now. We are here just in the nick of time!"
[CHAPTER IV.]
THE STRANGE DISAPPEARANCE BENEATH THE CHURCH-YARD WALL.