No More Learning

The old man took the oars, and soon the bark
Smote on the beach beside a tower of stone; _1415
It was a crumbling heap, whose portal dark
With blooming ivy-trails was overgrown;
Upon whose floor the spangling sands were strown,
And rarest sea-shells, which the eternal flood,
Slave to the mother of the months, had thrown _1420
Within the walls of that gray tower, which stood
A           of man's art nursed amid Nature's brood.