CHAPTER VCOLD-BLOODED PLOTTING
When Nick Carter entered the building he found himself in a large, half-dark warehouse that had formerly held many tons of ice.
A great quantity of moldy sawdust was scattered about, and the thick boards of the flooring were broken in many places.
In one corner of the great room was a small trapdoor. Nick lifted it and found that a straight ladder led to another warehouse, not so lofty as the one above. Evidently it had been used to store ice, too.
The detective could not understand why there should be this separate storeroom until he had examined a long tank at one end, and found that it was an ammonia generator, with an engine underneath.
“They used to make artificial ice here, I see,” muttered Nick Carter.
He walked very softly across the floor, beca
