It developed later.

One evening when all was quiet there was an explosion in the cellar.

It sounded like the muffled report of a dynamite cartridge.

The billiard players dropped their cues and some of them started for the door.

A second explosion followed and the coon porters' hair stood fairly on end and their faces became as near like chalk as a black man's can.
The proprietor started down cellar to investigate.