1.   Although largely unknown in Britain, Lafaille has an impressive rock climbing curriculum vitae.

2.   Even more than most of his predecessors, Gorbachev was virtually unknown in the West when he came to power.

3.   He was virtually unknown in the United States.

4.   I took refuge in the bookstore on the square and found Howl, which was unknown in Arizona at the time.

5.   Moreover, they are virtually unknown in established residential areas.

6.   The successful one was made by a couple totally unknown in Teesdale.

7.   They must be less common in wine-drinking regions and virtually unknown in strictly Mohammedan countries.

8.   Unfortunately, water remains unknown in materials returned from the lunar surface.

9.   The common household fork was nearly unknown in antiquity.

10.   A hundred years ago coronary heart disease was virtually unknown in Europe and America.