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About author:

Marie Euphrosyne Spartali, later Stillman (10 March 1844 – 6 March 1927), was a British Pre-Raphaelite painter of Greek descent, arguably the greatest female artist of that movement. During a sixty-year career she produced over one hundred works, contributing regularly to galleries in Great Britain and the United States.

Reference
http://en.wikipedia.org/wiki/Marie_Spartali_Stillman