The noblest conclusions of American history still rest upon premises which they laid.
But, in its broadest significance, the frontier knows no country.

It lies also in other lands and in other times than our own.

When and what was the Great Frontier?
We need go back only to the time of Drake and the sea-dogs, the Elizabethan Age, when all North America was a frontier, almost wholly unknown, compellingly alluring to all bold men.

That was the day of new stirrings in the human heart.

Some strange impulse seemed to act upon the soul of the braver and bolder Europeans; and they moved westward, nor could have helped that had they tried.