Mr. Cook cultivated a collection of Perpetual-Flowering varieties in the Royal Gardens, Sandringham, for King Edward VII and for Queen Alexandra. His efforts made the Royal Gardens famous for the display of carnations at every season of the year. James Douglas's name is inseperable from Carnations; "he has raised them, cultivated them, exhibited them, and written about them." He was also a veteran florist, with a half a century's practical experience. Mr. McLeod was a cultivator of the Souvenir de la Malmaison, equal to the best in Britain. His "Princess of Wales" variety is illustrated in one of the book's plates.