 The line was formally inspected by the Railway Inspectorate on 1 July 1889 , and the first official service on the line left Chesham for London 's Baker Street at 6 @.@ 55 am on 8 July 1889 . Throughout the day large crowds flocked to Chesham station to watch the trains , and the arrival and departure of each train at Chesham was greeted with peals of the bells of St. Mary 's Church . Over the course of the day 1 @,@ 500 passengers travelled on the line , and 4 @,@ 300 used the line in its first week of operations . 
