The following day Kim pulled up outside Keeper's Cottage. Just to be on the safe side, he was wearing his 1940s clothes. He got out of the car and leant back in to pick up his briefcase, then closed the door and started up the garden path.

A man came round the side of the house pushing a wheelbarrow. He was wearing wellington boots and green gardening gloves. Kim's heart sank. Johnny couldn't have been doing that well, then, if he had to employ a gardener.

Part of him was ...