This hum was not localized.

One could not have told exactly whence it came.

It filled the cabin with a kind of soft murmuring that soothed the senses like the drowsy undertone of bees at swarm.
For a moment nothing happened.

Then the pupils of Leclair's eyes began to dilate with astonishment.

Immovable though he still remained, the most intense wonder made itself apparent in his look.