Focus on Grotto in the Gulf of Salerno and explore the Description.
The subject of these paintings are the grottoes near Naples. Wright went on a tour of Italy in the 1770s, where he spent a great deal of time in 1774 sketching and painting scenes around Salerno and Naples. Good details of these forages are available, as Wright's notebook is extant.  For years afterward, he created paintings of Vesuvius and Virgil's Tomb, and crafted several variations on the cavern theme. Three of the paintings show the cavern at different times of the day, and they are sub-titled moonlight, sunset and ???
Vesuvius right Naples Virgil's Tomb