An extremely rare book as this is the true first edition of this title. Dated 1949 on the copyright page. No other dates. First UK edition. Illustrated throughout by Gilbert Dunlop. 

256 tight pages with no inscriptions, tears ,loss or foxing. 

Outer yellow boards are unmarked and universal in colour throughout. 

The original dust wrapper is complete and shows a price of 5/- net on the front flap. Small chip to the top of the spine. Rubbing along the flap fold.

This is a Collins Junior mystery book. 

Taken from the Enid Blyton society page all illustrations listed  are exactly the same as in this book confirming it as a first edition.