Rosa Clementina Petherick (September 1871 - 20 December 1931; Croydon, UK)
Rosa Clementina Petherick was a British book illustrator. She contributed illustrations to numerous children's story books, annuals and periodicals, particularly those produced by Blackie and Son Limited.

Rosa Clementina Petherick was born in 1871 in Addiscombe, Croydon. She was the eldest of five daughters born to the artist Horace William Petherick (1839-1919), whose black-and-white illustrations were frequently reproduced in periodicals. In the census of 1891 she and her four younger sisters are listed as living with their parents, William and Clementina, in Maple Lodge, at 25, Havelock Road, Croydon, and Rosa is recorded as an "art student". In the summer of 1896 she gained an "honourable mention" in a competition in The Studio, and her drawing of a lady picking flowers was reproduced under the pseudonym "Grumbler".

Horace Petherick is recorded as the householder until 1920, after which the Misses Petherick (including Rosa?) lived there until 1927.

Her illustrations of children and their toys were used by many publishers. They appear in numerous annuals and compilation volumes, particularly those produced by the prolific firm of Blackie and Son. Three colour plates are found in the 1931 Little One's annual by Blackie which are still full of movement and humour. Her early work is similar to that of many Victorian illustrators, but as her skills developed, the outlines become bolder, the colours simpler, and the compositions more striking, following the "poster" style made popular by John Hassall. Her work is often signed in full, Rosa C. Petherick, but she also developed a monogram of a backward-facing "R" sharing the upright with a "P", with a "C" superimposed.

Rosa died suddenly in Brighton on 28th December 1931, and was given a brief obituary in The Times. This mentions that her etchings were to be found in the National Portrait Gallery, that the music publisher Robert E. Mack took an interest in her work, and that she left three sisters "well known in the musical world".