Pigeon Post paperback 1986
Puffin books
The final run of Puffin editions each had a cover illustration by Anthony Kerins
The 1986 price was £3.99. The title pages include the original dedication to "Oscar Gnosspelius". They also include the "Author's Note" claiming that the Swallows and Amazons story came solely from Ransome's own childhood. Full details of the first edition here.