Frederick Goodall, The Street Musician, Frederick Goodall, 1864
This has also been called "song of the nubian slave". Information from christies:
"the street musician signed and dated 'f goodall 1864' (lower left) watercolour heightened with white on paper 29 x 38 in. (73. 7 x 96. 5 cm. ) painted in 1864. ". Date: 1864.