- (in late August or early September), Commander Ted Walker seems to receive a Royal Navy promotion to Captain (Damn!), meaning that the Swallows must camp on Swallow Island without their parents: events described in Secret Water follow.
- (in September) The Ds visit Norfolk again, finding the Death and Glories under suspicion... events described in The Big Six.
- Planned visit to Mrs Barrable by her brother Richard to occur "sometime in September" (PM)
September in Native history[]
- Frederick Field, the First Sea Lord despised by Roger in 1932 (SW1) suffers stomach trouble brought on by the Invergordon Mutiny
- 27 September: Selina King launched; AR writes War in his diary on the eve of Munich (LAR)