Richard Mansfield (1854-1907) was a renowned stage actor, known for his dramatic roles and for his innovative and flamboyant performances. He was famous for his portrayal of:
* Dr. Jekyll and Mr. Hyde: This was one of his most famous roles, which he performed in a production that made a major impact in the late 19th century.
* Cyrano de Bergerac: He was the first to bring this classic play to the English-speaking stage in 1898.
* Sherlock Holmes: He famously portrayed Holmes in a production that debuted in 1899.
There's no record of him writing books or any other literary works. He was primarily a performer.
It's possible you're thinking of a different Richard Mansfield or have confused his name with another. If you provide more information, I can assist you further.