Documentary Mercury Undercover - The "Mad Hatter" Story - YouTube
The Mad World of Hat Making | Amusing Planet
Beaver hats, 'felting' the body of the hats in the 'kettle' Mercury was used during the manufacture..., Stock Photo, Picture And Rights Managed Image. Pic. IAM-0460001647 | agefotostock
The Mad World of Hat Making | Amusing Planet
Weekend Weird Web Finds is now Random Goodness – News | Interesting history, History, Weird
How the Hatter Went Mad | Unframed
Mad hatter's disease: Definition, causes, and symptoms
Killer Clothing Was All the Rage In the 19th Century