The eighth book in the series first published in 1939 sees the main characters on holiday at Hamford Water, an area of tidal marshland and low-lying islands on the southern coast of Essex.
Note that the text box on the front panel omits the trailing quote mark from its last line. It was added at a later printing.
Jacket illustrations by the author.
ReproJacket #191-A-1, size 206.5x510mm.