Galatea falls in love with Acis, son of a river-god, but the Cyclops Polyphemus is in love with Galatea and is murderously jealous of Acis.
Bertin
How Hercules and Achelous came to fight one another over the hand of Deianira, resulting in one of the river god’s horns being wrenched off to become the Horn of Plenty.
A story of murder by a would-be lover, or perhaps of voyeuristics obsession. How Polyphemus murdered Acis, as shown by Claude, Tischbein, Moreau, Redon, and others.
Ovid, through Achelous the river god, explains how the Horn of Plenty was wrenched from Achelous’ head in a fight with Hercules. With a gem of modern narrative painting too.
The Eclectic Light Company 