Book excerpt: Combining the fascinating archive of the first Duchess of Northumberland with the expertise of Jane, the present duchess and the creator of the famous Poison Garden at Alnwick Castle, this gift book contains a collection of wonderful medicinal recipes passed down through generations. The reader will learn the secrets of the poisonous and curative properties of these plants and the more unusual varieties that have been cultivated and planted for centuries, and will discover how 'to make teethe whyte' and how 'to make heare growe'. Beautifully illustrated, The Duchess of Northumberland's Little Book of Poisons, Potions and Aphrodisiacs is the ideal gift for those with an interest in the wild plants of Britain, and for those with an interest in poisons and potions... The Duchess of Northumberland was responsible for the £35 million restoration of the 12 acres of walled garden at Alnwick Castle, which now includes the largest treehouse in the world and the famous Poison Garden. The Poison Garden remains one of the few places to have obtained permission from the Home Office to grow cannabis, opium poppies and catha edulis for display.