The writing of this book on that fascinating and somewhat neglected branch of garden literature-the old English Herbals-has been a labour of love, but it could not have been done without all the kind help I have had. My grateful thanks are due to the authorities at the British Museum, to Professor Burkitt of Cambridge, and very specially to Mr. J. B. Capper for invaluable help. I am indebted to Dr. James, the Provost of Eton, for his kind permission to reproduce an illustration from a twelfth-century MS. in the Library of Eton College for the frontispiece. I find it difficult to express either my indebtedness or my gratitude to Dr. and Mrs. Charles Singer, the former for all his help and the latter for her generous permission to make use of her valuable bibliography of early scientific manuscripts. I am further indebted to Dr. Charles Singer for reading the chapter on the Anglo-Saxon herbals in proof.