Tourmalin's Time Cheques

In 'Tourmalin's Time Cheques' by F. Anstey, Peter Tourmalin finds himself with an excess of hours and is approached by a stranger claiming to be a manager at the Anglo-Australian Joint Stock Time Bank. The stranger offers him a chance to deposit his excess time to be withdrawn at a later date. Several months later, seeking an escape from his overbearing wife, Peter decides to cash one of the cheques but what he gets may be more than he can stand for.