Hardyment visits the locations of all the S&A novels and hunts for real life parallels in geography and characters. The lake of the first adventures is a combination of Coniston and Windemere, but most of the terrain seems faithfully copied from one or the other (with the exception of the Swallowdale valley, which she leaves for future readers to pin down). She is greatly aided by the contents of Ransome's trunk, now in an archive, which contains notes, drawings, maps and unpublished material, much of which is shared here.
Hardyment was also able to interview many of the children (now adults) who inspired the characters, like the Altounyan family (including the real life Titty and Brigit!) and gather their recollections of Ransome. Most of these people are sadly dead now, so it's wonderful that Hardyment took the opportunity when it was available. She explores some of the waterways by windsurfing -- much easier for a solo sailor! -- and includes many photographs of Ransome, his boats and various children posing for the book illustrations.
One marvellous inclusion is a draft first chapter for Peter Duck, showing Captain Flint and the S&As beginning to invent the story of Peter Duck, which was eventually published without this framing device, but showing how different the final book might have been.
Arthur Ransome and Capt Flint's Trunk is the kind of treasure I scour Brotherhood Books for -- a delicious treat and one I will definitely devour again.