But what most interested the lads was a clearly outlined path, through the heavily settled dust, stretching across and beyond the platform, and leading to a door of white pine.

“I expect the voices we heard belonged to the same parties who made this trail,” was Billy’s low-toned opinion.

“Whoever they belonged to,” softly observed Henri, “I prefer to give them the benefit of the doubt, and if there is a window handy, opening on the good old outside, it’s me for it.”

“I’m with you this time, Buddy,” promptly agreed the Bangor boy; “I’ve had my full of this expedition, and ready to play quits.”

If Henri had anything further to say, it did not reach utterance, for quite distinctly now the lads could hear in varying strain the muffled intonation that had at first startled them in their stumble through the lower regions beneath.

Stealthily skirting the platform, the boys took to their knees in the dust, with their eyes on a level with the raised flooring, at a point immediately to the right of the big door.

It had been their intention to make their way past the door to the first turn of the counting room enclosure, which they were sure would set them going in the direction of the street flanking the west side of Memorial Square.

Off the platform they were afforded better opportunity for quick concealment in case any of the mysterious inmates of the supposedly deserted warehouse should suddenly appear on the higher plane.

From the near point of hiding the boys got a new idea of the center plan of the working floor, as adapted to the business for which it had been designed.

The counting house was arranged like a deck cabin of a ship, open space all around, a fact not apparent to the boys when they first emerged from the cellar.