Hackney carriage "jarvie"). In 19th century London, private carriages were commonly sold off for use as hackney carriages, often displaying painted-over traces of the previous owner's coat of arms on the doors. The Clarence or growler was a type of four-wheel, enclosed carriage drawn by two horses used as a hackney carriage, that is, as a vehicle for hire with a coachman. It is distinguished from a cab, hansom cab or cabriolet, in that those had only two wheels. It is distinguished from most coaches by being of slightly smaller size, nominally holding four passengers, and being much less ostentatious. A small,
Horse-drawn vehicle by a pair (or by a team of several pairs) have a "pole" which attaches between the wheel pair. Other arrangements are also possible, for example, three or more abreast (a "troika"), a wheel pair with a single lead animal (a "unicorn"), or a wheel pair with three lead animals abreast (a "pickaxe"). Very heavy loads sometimes had an additional team behind to slow the vehicle down steep hills. Sometimes at a steep hill with frequent traffic, such a team would be hired to passing wagons to help them up or down the hill. Horse-drawn carriages have been in use