Psmith in the City by P. G. Wodehouse (1881 - 1975)

Mike’s dream of studying and playing cricket at Cambridge are thwarted as his father runs into financial difficulties. Instead, Mike takes on the job of clerk at the “New Asiatic Bank.” Luckily, school friend Psmith, with his boundless optimism and original views, soon joins his department, and together they endeavour to make the best of their new life in London.
(Summary written by Gesine)