A few years before Winter Morning: Interior, Clausen had shown a Carlton Hill interior at twilight at the other end of the day. Twilight: Interior (RA 1909) has also been called Reading by Lamplight. The later picture I think, on the whole, shows Kit. This one shows Meg. M now has the lamp, which is made of inlaid lead.
Twilight: Interior is in the Leeds City Art Gallery. I think Winter Morning: Interior, whose main delight is the passage on the left, past the Dutch cabinet to the chair at the back, is in private hands.