author
1869–1926
A hugely prolific writer of school and adventure fiction, he helped shape the lively world of British story papers. He is especially remembered for creating the popular schoolgirl character Pollie Green and for writing under the name Mabel St. John.

by Henry St. John Cooper

by Henry St. John Cooper
Born in London in 1869, Henry St. John Cooper wrote at remarkable speed and in enormous volume. He became known for school stories, adventure tales, and serial fiction, contributing extensively to Amalgamated Press papers and magazines at a time when weekly story papers were a major part of popular reading.
He is best remembered for creating Pollie Green in 1908, a character often described as one of the standout schoolgirl heroines of the period. Cooper also wrote under the pen name Mabel St. John, and his range appears to have stretched from boys' and girls' periodical fiction to longer novels such as The Imaginary Marriage, The Garden of Memories, and Sunny Ducrow.
Some sources also note that he had family ties to well-known creative figures, including actress Gladys Cooper as a half-sister. A suitable confirmed portrait was not available from the sources I could verify here, so no profile image is included.