Whilst the Commons take no official part in the performance, the peers are represented either by Black Rod or by his deputy, the Yeoman Usher, who is accompanied by half-a-dozen stalwart doorkeepers and messengers, handy in case of a fray. The Board of Works are represented by the Chief Surveyor of the London District, accompanied by the Clerk of Works to the Houses of Parliament. The Chief Engineer of the House of Commons, who is responsible for all the underground workings of the building, leads the party, the Chief Inspector of Police boldly marching on his left hand. These are details prosaic enough. The nineteenth century has engrafted them on the sixteenth. The picturesqueness of the scene comes in with the appearance of the armed contingent. This is made up of some fourteen or sixteen of the Yeomen of the Guard, who arrive at the place of rendezvous armed with halberds and swords. The halberds look well, but this search is, above all, a business undertaking. It is recognised that for close combat in the vaults and narrow passages of the building halberds would be a little unwieldy. They are accordingly stacked in the Prince's Chamber, the Yeomen fearlessly marching on armed with nothing but their swords. Clad in their fifteenth century costume, they are commanded by an officer who wears a scarlet swallow-tailed coat, cocked hat, and feathers, gilt spurs shining at his martial heel. The spurs are not likely to be needed. But the British officer knows how to prepare for any emergency. Following the Yeomen of the Guard stride half-a-dozen martial men in costumes dating from the early part of the present century. They wear swallow-tail coats, truncated cone caps, with the base of the cone uppermost. They are armed with short, serviceable cutlasses and bâtons, such as undertakers' men carry, suggesting that they have come to bury Guy Fawkes, not to catch him. [Illustration: INSPECTOR HORSLEY.] Most of the underground chambers and passages of the Houses of Parliament are lit by electricity. Failing that, they are flooded with gas. When search for Guy Fawkes was first ordered, the uses of gas had not been discovered, much less the possibilities of electricity. Lanterns were the only thing, so lanterns are still used. As the dauntless company of men-at-arms tramp along the subterranean passages, it is pretty to see the tallow dips in the swinging lanterns shamed by the wanton light that beats from the electric lamps. PARLIAMENTARY CAVES.