The Elements of Murder: A History of Poison - John Emsley - Google Books

https://books.google.de/books?id=xXVEKN79diAC&pg=PA255&lpg=PA255&dq=dr+grapel+george+chapman&source=bl&ots=IRWXep5slb&sig=WiduFv

This book is about elements that kill. Mercury, arsenic, antimony, lead, and thallium can be lethal, as many a poisoner knew too well. Emsley explores the gruesome history of these elements and those who have succumbed to them in a fascinating narrative…