Catherine Maria Fanshawe (1765–1834) was an English poet. The daughter of a Surrey squire, she wrote clever occasional verse. Her best-known production is the famous Riddle on the Letter H, beginning "'Twas whispered in heaven, 'twas muttered in hell" often attributed to Lord Byron.
This article incorporates text from a publication now in the public domain : Cousin, John William (1910). A Short Biographical Dictionary of English Literature. London, J. M. Dent & Sons; New York, E. P. Dutton.