Cabs.—These convenient vehicles have completely superseded the old pair-horse hackney-coaches in London; no vehicle of the kind being now ever seen. There are, according to the return above quoted, 6,793 of the modern single-horse hackney-coaches in the metropolis altogether—of two different kinds, ‘four-wheelers’ and ‘Hansoms,’ (named after the patentee.) The ‘four-wheelers’ are the more numerous; they have two seats and two doors; they carry four persons, and are entirely enclosed. The ‘Hansoms’ have two very large wheels, one seat to accommodate two persons, and are open in front; the driver is perched up behind, and drives his vehicle at a rapid rate. Railways.—If omnibuses and cabs are more important than railways to strangers while _in_ London, railways are obviously the most important of the three when coming to or departing from London. The following are a few particulars concerning such railways as enter the metropolis. _London and North-Western Railway_ has its terminus just behind Euston Square. The noble portico in front—by far the finest thing of the kind connected with railway architecture—has been rendered ridiculous by the alterations in the buildings behind it; for it is now at one corner of an enclosed court, instead of being in the centre of the frontage. A new hall leading to the booking-offices, finished in 1849, is worthy of the great company to which it belongs; the vast dimensions, the fine statue of George Stephenson, and the _bassi-rilievi_ by Thomas, render it an object deserving of a visit. This station is the London terminus of a system exceeding 1,446 miles. The _Midland Railway_ has a magnificent terminus in the Euston Road, and a junction with the Metropolitan line. It has already more than 800 miles open. _Great Northern Railway_ has its terminus at King’s Cross—a building more remarkable for novelty than for beauty. This company, a severe competitor to some of older date, has few stations near London; but the directness of the line of railway renders it important as an outlet to the north. A good hotel is contiguous to the terminus. The goods’ depôt has become famous for the vast quantity of coal brought to the metropolis. _Great Western Railway_ has its terminus at Paddington, where a fine new station was built a few years ago. A style of arabesque polychrome decoration has been adopted, not seen at other metropolitan stations. Paddington is the head-quarters of the broad-gauge system, which extends to Weymouth in one direction, to Truro in a second, to Milford Haven in a third, and to Wolverhampton in a fourth; but some of the broad-gauge lines belong to other companies; while, on the other hand, this company has adopted the double-gauge on about 400 miles of its line. The terminus has a splendid new hotel adjoining it.