Abstract
The stir caused by the success of the book The Crimes of Charlotte Brontë, and the recent revelation based on DNA evidence that the third US President, Thomas Jefferson;, fathered a child by a mulatto slave;, emphasizes the need for scholars to be aware of the quality of documentary evidence. Using the death of Patrick Brontë's wife, Marie, in 1821 as an example;, the author shows that given the parlous state of medical knowledge at the time;, we can be far from certain about the cause of her death.