View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
This is one of 32 red chalk academic nudes worked into this volume. See the sketchbook introduction for further explanation.
The page is stained by the glue used to fasten the crimson leather loops and corner details to the covers.
The upper right hand quadrant of the verso bears the counterproof of the drawing on folio 5 recto (D27485; Turner Bequest CCLXXIXb 5).