A Monster in the Heart: Edward May’s *A Most Certaine and True Relation* (1639)

This 17th-century medical treatise still puzzles researchers centuries after it was written. Was it a serpent in John Pennant’s heart? Or something more mundane?

A Monster in the Heart: Edward May’s *A Most Certaine and True Relation* (1639)

This 17th-century medical treatise still puzzles researchers centuries after it was written. Was it a serpent in John Pennant’s heart? Or something more mundane?