The information which was obtained on these heads will be found to constitute a very valuable addition to what was heretofore known upon the subject.

It was far stronger than iron-stronger than tungsten, the strongest metal heretofore known.

Nor does it suit with what has been known of you heretofore.

Short chose a defense he had heretofore known nothing about and Speelman chose an attack against it that almost no one knows much about.

To see your friends start cheerfully on a journey, signifies delightful change and more harmonious companions than you have heretofore known.

We have not heretofore known, save by the most unreliable and roundabout reports, that such an organization as your Galactic.

Your lives will be immeasurably fuller, higher, greater than any heretofore known to this universe.

Sheck, heretofore known as a poet, has gone out on a literary limb, and the result is dazzling.

Those waves are of some ultra-band, of a frequency immensely higher than anything heretofore known.

This was strange water coming out of the well now, and the thoughts and actions that it nourished were more extravagant than any heretofore known.