In those days they didn't use mileometers, what they did was they took any particular route number and the number of journeys they did, because in those days a bus kept on a route which applied, say between Witton and Rushmere Heath all day, didn't run around like they do nowadays and erm when the schedules were prepared, each bus had got a route number or was placed on a route number, say one Witton, two Witton, three Witton and a copy of its schedule was recorded on another sheet and the mileage, having known what the mileage was and we'd used to obtain that from the Borough Surveyor's Department, er I think it was about nine point one four miles a return trip Witton and Rushmere Heath, er you'd work out how many journeys they did there and say well that bus was due to run a hundred and twenty six miles during the day.