I especially want to thank the following people for their invaluable assistance during the various stages of writing this book. Their support and contributions to a project like this were of great importance to achieving the goals that I set. Without all this help, the final product would certainly not be as complete as it is.
Archives: Herrenhäuser Gärten Hannover — Germany
Herbarium, Library, Art & Archives, Royal Botanic Gardens, Kew
D. U. Bellstedt
Dr. B. Bytebier
A. & C. Mather
M. & J. Evans
My mother, my father and my brother