However, it does come from a real image taken by the orbiter, showing a square(ish) feature, assuming you fill in the connecting lines in your own head. The whole image itself shows an area about ...

The Graphic ; The first Italian Hospital in London-Queen's Square, Bloomsbury Scenes are individually captioned: 1. The Dispensary. 2. A Queen Anne mantelpiece in a ward. 3. An objection to the bath.