Isabelle Duncan (2 July 1812 – 26 December 1878) was a British author known for her book which explained scientific theories in terms of the accounts known from the Bible.
This pre-Adamite theory postulated a race of people before Adam, and also explained the origin of angels.
[1] At that time, the Bible gave evidence that the earth was thousands and not millions of years old.
[2] Her husband, a minister, did not agree with the main idea of her book, but he offered his expertise with theology and created some illustrations.
[citation needed] His father was Scottish banker, minister and social reformer Henry Duncan.