There is only one authentic portrait of Henry Cavendish. Cavendish was an English chemist and physicist. He is best known for his discovery of hydrogen gas. Cavendish was born in 1731 and died in 1810.
Portrait #1, William Alexander, Date Unknown
Portrait #1 is by William Alexander. The date of the portrait is unknown. Alexander (1767-1816) was an English artist. This well-respected artist had a very distinctive style.
It is likely that there are additional portraits of Cavendish. It seems that he was not frequently portrayed, although you never know when a portrait may turn up. Still wondering about a portrait in your family collection? Contact us... it could be a portrait of Henry Cavendish.