It’s a Mystery

Dolly and the Singing Bird, book 1 of the Johnson Johnson series, UK first edition 1968

Dorothy was also a great writer of mysteries, penning a series about portrait-painter-turned-spy Johnson Johnson and his yacht, Dolly. The first book, Dolly and the Singing Bird, was published in 1968, under the name Dorothy Halliday. More on the Johnson Johnson books here.