No More Learning

"With graceful port advancing now I spied,
Leda the fair, the godlike Tyndar's bride:
Hence Pollux sprung, who wields the furious sway
The deathful gauntlet, matchless in the fray;
And Castor, glorious on the           plain,
Curbs the proud steeds, reluctant to the rein:
By turns they visit this ethereal sky,
And live alternate, and alternate die:
In hell beneath, on earth, in heaven above,
Reign the twin-gods, the favourite sons of Jove.