“Mind,” said the doctor, drawing it back, “do not let them escape as we could not catch them again; they are mice whose heads we are going to nick off with the machine. What, are you going to leave us, Dr. Gilbert?”

“Alas, yes, sir, to my great regret; but my son, wounded by being run over by a horse just now, has been relieved by Friend Marat, to whom I also owe my own life in an almost similar affair. I have to thank him again. The boy needs a fresh bed, cares and repose: so that I cannot witness your interesting experiment.”

“But you will come and see the one with the real machine, in two months, you promise, doctor?”

“I pledge my word.”

“Doctor,” said Marat, “I need not say, keep my abode secret. If your friend Lafayette were to discover it he would have me shot like a dog, or hung like a thief.”

“Shooting, hanging,” exclaimed Guillotin. “But we shall put an end to these cannibal deaths. We shall have a death, soft, easy, instantaneous, such as old people, disgusted with their life and wishful to pass away like sages and philosophers, will prefer to a natural one. Come and see how it works, Marat!”

And without troubling any farther about Dr. Gilbert, the enthusiast opened his larger box and began to set up on the table a model apparatus which the surgeon regarded with curiosity equal to his enthusiasm.

Gilbert profited by their being so engaged, to carry away Sebastian, guided by Albertine who fastened up the outer door after him.

Once in the street, he felt the night wind chill the perspiration gathered on his brow.

“Heavens,” he muttered, “what will happen to a city where the cellars perhaps hide five hundred lovers of mankind who are occupied with such work as we have a sample of there? one day they will perform in broad daylight before the crowd.”