"Your cigarettes are of the best tobacco, monsieur," said Charles Carnet. "Au bon fumeur! My brother and I had expected to spend a lonely evening. Here's to the fortunate chance that brought us guests!"
He tossed off a thimbleful of the purple wine with a flourish.
"But I could wish, gentlemen," said his brother, "that we could have entertained you better, I am afraid we are old-fashioned in our ways, and prefer a simple menage. At any rate, there might have been more light upon the scene. The fire is all very well, but these two candles give hardly any illumination. As a rule, our workshop is lit with electric light, and we also use the current for our lathe. An hour ago, however, there was a 'fizz' and a 'spit' from that porcelain box there in the casing of the electric wires, and, behold! the light went and the lathe will not work. It has happened before, and we must now wait till to-morrow for the electrician to come from the works and put it right for us."
Basil Gregory laughed. "Fate hath many surprises, Monsieur Carnet," he said, "and surely we have been specially sent to your assistance to-night! My friend and I are both electrical engineers attached to the superintending station of the Société Générale at Mont Parnasse. I expect I know what has happened. And I shall be very much mistaken if I cannot put it right for you in two or three minutes."
The little gentlemen were on their feet in a second, chirping and twittering with pleasure.
"Tiens! Edouard," said Brother Charles, "we have been entertaining angels unawares!"
"You are right, Charles," said Brother Edouard. "Angels of light."
Gregory and Deschamps went to the opposite wall of the workshop, moving cautiously among the benches, litter of wood-blocks and tools. Deschamps held one of the candles while Gregory deftly unscrewed the round porcelain cap of the cut-out. It was as he suspected, and he pulled out the semi-circular china bridge from its brass clips and showed it to his hosts.
"It is quite simple," he said. "Between this brass screw and this, there is always a soft wire made of tin and lead—fusible metal, we call it. All the current which lights your lamps and runs your lathes passes through the insulated copper wires, but it has to pass through the little lead wire as well. From some reason or other the current gets too strong and might heat the wires and create a fire; the little lead wire strung on this half-circle melts with the heat, and the current is shut off. That was the spitting noise you heard."