This comic drawing is by an amateur artist, Heneage Finch, 4th Earl of Aylesford.
It shows an imaginary exchange between
a caricatured version of a celebrated classical statue, known as the Farnese Hercules, and a gentleman in a cellar.
The statue says that as long as he supports the vault, which rests on his head, it will not fall. The gentleman replies that the statue
is doing a better job there than he would
in the Academy - an allusion presumably
to his misshapen limbs and features.
The Farnese Hercules was widely
admired and discussed among artists