In 1937 Watford and QPR were in Div 3 South (equiv League 1) That season QPR finished 3rd and Watford 4th, My great uncle Alan Bonner played for QPR (as was common at that level in those days) he was part time - his full time job was a Met PC. This letter is priceless in comparison with how things are organised today. I think there is a typo, the next game was Clapton (later Leyton Orient) not Clacton