The art of building barricades was also—you never would suspect it!—very ardently and conscientiously studied. This special branch of the science of fortification reckoned more than one Vauban and Gribeauval among its numbers. “Professor of barricading,” was a title honored at the Cafe de Seville, and one that they would willingly have had engraved upon their visiting-cards. Observe that the instruction was only theoretical; doubtless out of respect for the policemen, they could not give entirely practical lessons to the future rioters who formed the ground-work of the business. The master or doctor of civil war could not go out with them, for instance, and practise in the Rue Drouot. But he had one resource, one way of getting out of it; namely, dominoes. No! you never would believe what a revolutionary appearance these inoffensive mutton-bones took on under the seditious hands of the habitues of the Cafe de Seville. These miniature pavements simulated upon the marble table the subjugation of the most complicated of barricades, with all sorts of bastions, redans, and counterscarps. It was something after the fashion of the small models of war-ships that one sees in marine museums. Any one, not in the secret, would have supposed that the “beards” simply played dominoes. Not at all! They were pursuing a course of technical insurrection. When they roared at the top of their lungs “Five on all sides!” certain players seemed to order a general discharge, and they had a way of saying, “I can not!” which evidently expressed the despair of a combatant who has burned his last cartridge. A “beard” in glasses and a stovepipe hat, who had been refused in his youth at the Ecole Polytechnique, was frightful in the rapidity and mathematical precision with which he added up in three minutes his barricade of dominoes. When this man “blocked the six,” you were transported in imagination to the Rue Transnonain, or to the Cloitre St. Merry. It was terrible!