Swallows and Amazons hardback 1958
First published in 1931
The end-paper maps and the chapter heading illustrations were by Helene Carter. There were no full-page illustrations.
The title pages include the Altounyan dedication "To the six for whom it was written in exchange for a pair of slippers". Full details of the first edition here.
Copies of this edition are available, but one must be prepared for the occasional ex-library copy with its resultant damage.