View this artwork by appointment, at Tate Britain's Prints and Drawings Rooms
With the page turned vertically, the loosely worked setting seems to be a dark interior or a curtained bed, with pale shapes below suggesting a figure or figures within. The blue strokes at the top appear to indicate the bed curtains; compare the similar effect on folio 39 verso opposite (D28841).
For a discussion of the improvisatory and often erotic nature of the watercolour studies making up most of this sketchbook, see the Introduction.
Blank, save for slight offsetting of watercolour to or from folio 41 recto opposite (unaccessioned; the verso is D28844).