Omnibuses. The total number traversing the streets of London is about 1500. The earnings of each vehicle vary from 2l to 4l a day. Be careful to observe the fares that are marked upon the outside; and if you are in the least doubt, be sure and ask the conductor before you enter, otherwise you maybe made to pay sixpence.
Source: A Handbook for London, Past and Present. Peter Cunningham. Published by John Murray 1849.