“We’ll talk with the Fire Chief and then let’s head for a telephone and call the office,” Salt declared.
As they started toward the fire lines, a strange sound accosted their ears. Hearing it, Salt stopped short to listen. From the gates outside the factory came the rumbling murmur of an angry crowd.
“A mob must be forming!” Salt exclaimed. “Something’s up!”
He started for the gate with Penny hard at his heels.
At first they could not see what had caused the commotion. But as the group of angry employes swept nearer the gate, a man in a light overcoat who apparently was fleeing for his life, leaped into a car which waited at the curb.
“Quick!” Penny cried. “Take a picture!”
Salt already had his camera into position. As the car started up, the flash bulb went off.
“Got it!” Salt exclaimed triumphantly.
Penny tried to note the license number of the automobile, but the plate was so covered with mud she could not read a single figure. The car whirled around a corner and was lost to view.
“Salt, that man may have been the one who set off the explosion!” Penny cried. “The mob is of that opinion at least!”