1.   The private sector now offers another rich seam to mine.

2.   This produced a rich seam of tips, much of it from the artists at the Theatre Royal during rehearsals.

3.   After many years of steady stage and television work, it was as if she were exploring a rich new emotional seam in her work.

4.   Her words have struck a rich seam of anti-Americanism that lies just below the surface not only in Muslim countries, but in much of the third world.

5.   Among the crowd in Nampula, politically marginalised for so long that it is now a rich seam of untapped votes, were many opposition party supporters.