With the page turned vertically, Turner has used the upper third of the page for a study of the sky, centred on a disk, presumably the sun. The rough hatching and other loose marks around it are difficult to interpret, but appear to be a combination of clouds, rain and possibly trees. Turner’s brief pictorial note is augmented by typical colour annotations.
For other sky studies in this book, see the entry for the inside of the front cover (D40982).
The drawing is a little disrupted by offsetting from the chalk and wash studies on folio 40 recto opposite (D17830).