In another quarter a set of workmen were economically converting an old first-class into a second-class--the transmutation being effected by taking out the lining, and then converting large, fashionable, oval windows into little vulgar square ones. But though comfort, like cheese, bacon, or any other description of merchandise, was thus doled out to each class of passengers according to the amount of it which they may desire to purchase, the materials of all the carriages appeared to be of good sound quality. The panels of first, second, and third-class carriages, as well as those even of luggage-vans, are invariably made of mahogany; “the bottom-sides” of English oak; the rest of the framing of ash. The break-blocks are made of willow, and usually last about ten weeks’ work. Adjoining this congregation of carriages is a smith’s shop, containing twenty-eight forges and a tire-oven; above which we found a large store-room filled with lace-trimming, horse-hair, superfine cloth, varnished oil-cloth, nails, rugs, and, among a variety of other requirements, plateglass for windows. We observed that those for the front glasses of coupés--in order to enable them to resist the occasional pelting of hot cinders from the engine--were half an inch thick! There was also, in an adjoining store, a collection of old cushions, mercilessly indented and worn out by some description of dull heavy pressure. 2. The hospital of the Coach Department at Crewe is an enormous shed, 600 feet long by 180 broad. It is capable of holding 90 carriages, with ample room for working around them, but only 80 were under repair. Among them we observed several flying post-offices and tenders bearing the Royal arms. Adjoining is a large smith’s shop, also a spacious yard containing a heavy stock of timber piled under sheds, with an office for recording the daily amount received and delivered. On entering “_the Grease house_,” which, contrary to expectation, we found to be as clean as a dairy, we perceived, standing against the walls, three huge casks of Russia tallow, a quantity of yellow palm-oil, several boxes of soda, and a water-cock. On the opposite side there was a small steam-boiler for heating two open cauldrons and two wooden cooling-vats. This apparatus is constructed for the fabrication of that yellow mixture which our readers have seen bestowed so generously to the axles of the carriages of every train. We had often in vain endeavoured to ascertain its composition, which, from the grease-master, the highest possible authority on the subject, we at last discovered to be as follows:-- 200 lbs. of Russia tallow. 70 lbs. of palm-oil. 20 lbs. of soda. 50 gallons of water. Besides heating the two cauldrons we have mentioned, large iron pipes pass from the steam-boiler to the immediate vicinity of two casks, each containing one ton of sperm-oil, which is thus kept constantly fluid, instead of crystallizing, as it is prone to do, during cold weather.