Henry Joseph Darger, Jr (circa April 12, 1892 – April 13, 1973) was a reclusive American writer and artist who worked as a custodian in Chicago, Illinois.  He has become famous for his posthumously-discovered 15,145-page, single-spaced fantasy manuscript called The Story of the Vivian Girls, in What is known as the Realms of the Unreal, of the Glandeco-Angelinian War Storm, Caused by the Child Slave Rebellion, along with several hundred drawings and watercolor paintings illustrating the story. Darger’s work has become one of the most celebrated examples of outsider art
if you’ve never seen Jessica Yu’s doc about Darger, In The Realms of The Unreal, you have to correct this mistake immediately 

Henry Joseph Darger, Jr (circa April 12, 1892 – April 13, 1973) was a reclusive American writer and artist who worked as a custodian in Chicago, Illinois.  He has become famous for his posthumously-discovered 15,145-page, single-spaced fantasy manuscript called The Story of the Vivian Girls, in What is known as the Realms of the Unreal, of the Glandeco-Angelinian War Storm, Caused by the Child Slave Rebellion, along with several hundred drawings and watercolor paintings illustrating the story. Darger’s work has become one of the most celebrated examples of outsider art

if you’ve never seen Jessica Yu’s doc about Darger, In The Realms of The Unreal, you have to correct this mistake immediately