I pulled the table with the coffer out into the light, and shifted it until the translucent patches were in the direction of the stars.

Instantly the box began to glow, as you saw it under the lamps, though but slightly.

I waited and waited; but the sky clouded over, and the light died away.

So I got wires and lamps--you know how often I use them in experiments--and tried the effect of electric light.

It took me some time to get the lamps properly placed, so that they would correspond to the parts of the stone, but the moment I got them right the whole thing began to glow as you have seen it.
"'I could get no further, however.