But at this hour of the night, between nine and ten o'clock, I can arrange to get him out of Paris by the Villette gate, and that is where I want you, Ffoulkes, and you, Tony, to be, with some kind of covered cart, yourselves in any disguise your ingenuity will suggest.
Here are a few certificates of safety; I have been making a collection of them for some time, as they are always useful." He dived into the wide pocket of his coat and drew forth a number of cards, greasy, much-fingered documents of the usual pattern which the Committee of General Security delivered to the free citizens of the new republic, and without which no one could enter or leave any town or country commune without being detained as "suspect." He glanced at them and handed them over to Ffoulkes.
"Choose your own identity for the occasion, my good friend," he said lightly; "and you too, Tony.

You may be stonemasons or coal-carriers, chimney-sweeps or farm-labourers, I care not which so long as you look sufficiently grimy and wretched to be unrecognisable, and so long as you can procure a cart without arousing suspicions, and can wait for me punctually at the appointed spot." Ffoulkes turned over the cards, and with a laugh handed them over to Lord Tony.

The two fastidious gentlemen discussed for awhile the respective merits of a chimney-sweep's uniform as against that of a coal-carrier.
"You can carry more grime if you are a sweep," suggested Blakeney; "and if the soot gets into your eyes it does not make them smart like coal does." "But soot adheres more closely," argued Tony solemnly, "and I know that we shan't get a bath for at least a week afterwards." "Certainly you won't, you sybarite!" asserted Sir Percy with a laugh.
"After a week soot might become permanent," mused Sir Andrew, wondering what, under the circumstance, my lady would say to him.
"If you are both so fastidious," retorted Blakeney, shrugging his broad shoulders, "I'll turn one of you into a reddleman, and the other into a dyer.

Then one of you will be bright scarlet to the end of his days, as the reddle never comes off the skin at all, and the other will have to soak in turpentine before the dye will consent to move....

In either case...