The Erecting-shop at Crewe is a room 300 feet long by 100 feet broad, containing five sets of rails, upon three of which are erected the new engines and tenders--the other two being usually occupied by those under heavy repair. The number of artificers we found employed was 220. In this magnificent building we saw in progress of erection 20 passenger-engines, also 10 luggage-engines; and as this shop has (as we have before stated) turned out a locomotive engine and tender complete on every Monday morning for very nearly a year, and is continuing to supply them at the same rate, we had before us in review locomotive engines in almost every stage of progress; and when we reflected on the innumerable benefits, and even blessings, which resulted to mankind from their power, it was most pleasing to be enabled at one view to see--as it were in rehearsal behind the scenes--performers who were so shortly to appear upon the stage of life. At the further end of the line of rails close to the north wall there appeared a long low tortuous mass of black iron-work, without superstructure or wheels, in which the form of an engine-bed in embryo could but very faintly be traced; a little nearer was a similar mass, in which the outline appeared, from some cause or other, to be more distinctly marked; nearer still the same outline appeared upon wheels: to the next there had been added a boiler and fire-box, without dome, steam-escape, or funnel-pipe; nearer still the locomotive engine in its naked state appeared, in point of form, complete:--and workmen were here busily engaged in covering the boiler with a garment about half an inch thick of hair-felt, upon which others were affixing a covering of inch deal-plank, over which was to be tightly bound a tarpaulin, the whole to be secured by iron-hoops. In the next case the dome of the engine was undergoing a similar toilette, excepting that, instead of a wooden upper garment, it was receiving one of copper. Lastly--(it was on a Saturday that we chanced to visit the establishment)--there stood at the head of this list of recruits a splendid bran-new locomotive engine, completely finished, painted bright green--the varnish was scarcely dry--and in every respect perfectly ready to be delivered over on Monday morning to run its gigantic course. On other rails within the building were tenders in similar states of progress; and, as the eye rapidly glanced down these iron rails, the finished engine and tender immediately before it seemed gradually and almost imperceptibly to dissolve, in proportion to its distance, until nothing was left of each but an indistinct and almost unintelligible dreamy vision of black iron-work. On one of the furthest rails, among a number of engines that were undergoing serious operations, we observed “_The Colonel_,” which, by going off the rails at Newton Bridge, caused the death of General Baird. _Coach Department._