The following, the source of the artist information verified by the description of the image, is from the opening paragraph (on the sample page) of:

“Postscript to the Odyssey”:
Pope’s Reluctant Debt to Milton
by James Gray.
Wiley Online Library. Milton Quarterly, Volume 18, Issue 4, p. 105. 1984. Version of record online: 3 APR 2007.

"If it is true that every picture tells a story, the vignette drawn by Francis Hayman and engraved by Charles Grignion in 1747 for the title page of William Mason’s Musaeus: A Monody to the Memory of Mr Pope, In Imitation of Milton’s Lycidas is a notable illustration of that truth. The scene, appropriately, is a grotto, in which a female figure, representing Fame or Virtue, and wearing the creative sunburst or halo of Apollo, is supporting the seated figure of the dying Alexander Pope, while three deeply concerned poets - Milton, Spenser, and Chaucer -all look on. Spenser, in pastoral dress, is the most moved, as he laments the passing of another Colin Clout; Chaucer’s eyes are closed as he meditates once more the shortness of this life; but Milton has a partly wistful, partly pained look, as he clings to his lyre with one hand and, with the other, held reverently across his breast, salutes his declining successor."