"Now mark the signs of future ease and rest,
And bear them safely treasured in thy breast:
When, in the shady shelter of a wood,
And near the margin of a gentle flood,
Thou shalt behold a sow upon the ground,
With thirty sucking young encompassed round,
The dam and offspring white as falling snow,—
These on thy city shall their name bestow,
And there shall end thy labours and thy woe."
Æneid, iii. 388.