So long they traueiled with litle ease,
Till that at last they to a Castle came,
Built on a rocke adioyning to the seas;[500]
It was an auncient worke of antique fame[501],
And wondrous strong by nature, and by skilfull frame.
Therein three sisters dwelt of sundry sort, xiii
The children of one sire by mothers three;
Who dying whylome did diuide this fort
To them by equall shares in equall fee:
But strifull[502] minde, and diuerse qualitee