Catherine Louisa Pirkis (1841-1910) was a British author. She wrote numerous short stories and 14 novels between 1877 and 1894, and is perhaps best known today for her detective stories featuring Loveday Brooke. She moved from writing to animal charity work and, together with her husband, was one of the founders of the National Canine Defence League in 1891. Her works include The Experiences of Loveday Brooke: Lady Detective (1893).