It is one of two highly finished studies which are related to the oil version of the subject at Exeter college, Oxford (c.1876-77).
There is a difference in the definition of the hair - darker in the image that appears in Die Kunst Unserer Zeit image ( buff coloured) The drawing on green paper is in the Fitzwilliam details below:- graphite with highlights in white bodycolour on green paper, height 168mm, width 210mm, 1876-1877 Accession no 2019 B