Bréquigny himself drew the material for many important studies from the rich mine which he had thus exploited.

All the rich mines have since being exhausted and at present they do not offer a fair field for the employment of capital.

You now own the rich mine, and no longer will happiness be yours.

Nowhere in the world is there such a concentration of rich mines as at Johannesburg.

Those records could prove to be a rich mine of information.

And the richest mine in this half of the world.

He was 'super' of a rich mine, and his partners suddenly disappeared.

A rich mine was discovered around this place in the year 1608 and the population settled until 1610.

In 1612, a church was built but later destroyed due to the discovery of a rich mine.

This means that less energy rich mines are used than earlier.