Who joined Lord Byron at Lake Geneva during the summer of 1816?

During the summer of 1816, several individuals joined Lord Byron at Lake Geneva, where he had leased the Villa Diodati in Cologny.123

The group included:

• Percy Bysshe Shelley: A fellow poet who became a close friend of Byron during their time together.23
• Mary Wollstonecraft Godwin: Shelley’s partner (later Mary Shelley), who began writing her novel Frankenstein during this stay.12
• Claire Clairmont: Mary Godwin’s stepsister, who had initiated an affair with Byron in England and persuaded the others to travel to Geneva to see him.13
• John Polidori: Byron’s personal physician, who accompanied him from England and also produced literary work during the summer.13
• Matthew Lewis: The author of the Gothic novel The Monk, who also visited the group.3

This gathering, often referred to as the "haunted summer," was marked by intense creative collaboration and philosophical discussion, famously resulting in a ghost story contest among the guests.123