"What light is that?" asked Dr. Macpherson of the two who were on trial, amidst breathless silence.
A momentary pause. Colonel West and Cooper turned their eyes up to the raised lamp; the crowd turned theirs.
"It's green," said the colonel.
"It's red," said Cooper.
And there arose a general laugh. For the lamp was blue.
Two lamps were next run up.
"What are they?" was the demand
A dead silence ensued. Neither Cooper nor the colonel could tell.
"I ask what are the colours of these two lamps?" repeated the professor.
"I think they are green and white," hazarded Cooper, at length.