I found numerous articles about him. I think this was on HN before: https://www.smithsonianmag.com/smart-news/one-man-two-deadly-substances-20th-century-1809632

I found numerous articles about him. I think this was on HN before: https://www.smithsonianmag.com/smart-news/one-man-two-deadly-substances-20th-century-180963269/ https://www.smithsonianmag.com/smart-news/one-man-two-deadly...