After passing through a grinding-shop and a coppersmith’s shop, which we must leave without comment, we entered a most important and interesting workshop, 330 feet in length, by 60 feet in breadth, termed the “fitting-shop,” because the work brought here in various states is all finally finished and fitted for its object. Besides 11 planing-machines, 36 shaping and slotting machines, and 30 turning-lathes, all working by steam-power, we observed, running nearly the whole length of the building, five sets of tables, at which were busily employed in filing, rasping, hammering, &c., eight rows of “_vice-men_,” only so called because they work at vices. The whole of the artificers in this room are of the best description, and the importance of their duties cannot perhaps be more briefly illustrated than by the simple fact that, besides all the requisite repairs of 200 locomotive engines, they were employed in finishing the innumerable details of 30 new ones in progress. Some were solely engaged in converting bolts into screws; some in fitting nuts; some in constructing brass whistles; in short, in this division of labour almost every “vice man” was employed in finishing some limb, joint, or other component part of a locomotive engine destined to draw trains either of goods or passengers. After visiting a large store-room, in which all things appertaining to engines, sorted and piled in innumerable compartments, are guarded by a storekeeper, who registers in a book each item that he receives and delivers, we will now introduce our readers to the climax of the establishment, commonly called “_the Erecting-shop_.” Hitherto we have been occupied in following in tedious detail from the foundry to the forge, and from the anvil to the vice, the various items, such as plates, rivets, bolts, nuts, rings, stays, tubes, ferrules, steam-pipes, exhausting-pipes, chimney-pipes, safety-valves, life-guards, axle-boxes, pistons, cylinders, connecting-rods, splashers, leading and trailing wheels, &c., amounting in number to 5416 pieces, of which a locomotive engine is composed. We have at last, however, reached that portion of the establishment in which all those joints, limbs, and boilers, which have been separately forged, shaped, and finished in different localities, are assembled together for the consummation of the especial object for which, with so much labour and at so great an expense, they have been prepared: indeed, nothing, we believe, can be more true than Mr. Robert Stevenson’s well-known maxim--“_A locomotive engine must be put together as carefully as a watch!_”