John Croall & Sons were a Castle Terrace, Edinburgh firm of funeral undertakers and carriage hirers founded in 1850[1] who expanded their business to include coaches, cabs and coachbuilding.
Although fifteen feet long, they are constructed in two chief compartments, calculated to carry each only two inside passengers, besides the capacious hind-boot for the mail-bags, and a fore-basket fitted with leather aprons and glasses, holding the guard, in addition to its two passenger occupants; whilst the driver only can be said to be mounted outside, being on the box.
Thus the whole occupants of the capacious Russian mail travel in the most luxurious manner, amid Elysian padding and cushions, with their faces to the horses.
The exterior panels are most elaborately painted, and varnished until they shine like glass, in the Russian Imperial livery of dark green, relieved with heads of gold, size etc.
and adorned only with double crowned heads of the black eagle, with the sceptre and globe in its talons, the Imperial crest and shield representing the equestrian Peter the Great".