Euston railway station
A permanent line of narrow gauge was constructed between Euston railway station and the North West District Post Office in Eversholt Street, a distance of approximately a third of a mile. The line was tested from 15 January 1863, and operation started on 20 February 1863. A capsule conveying up to 35 bags of mail could make the short journey between terminals in one minute. Thirteen journeys were operated each day, with a daily operating cost of £1 4s 5d. The Post Office was charged a nominal fee for use of the service, presumably to encourage them to accept the technology.