There is often great advantage in a position of obscurity from which to look out on the world. The lace-weaving of Nottingham founded a great industry in caves, as described below: 

   This great (lace) industry here began in this way: There is, or was, originally, a long, high bank of very soft sandstone on the north bank of the river Trent, pointing to the sun. In this soft sandstone the early Britons dug caves. They dug them deep and wide and wonderful in construction. It is said that even now the city of caves under the ground is almost as large as the broad and populous city on top of the ground. In case of invasion or conquest these cave - dwellers would retreat underground and defy pursuit. It is the boast of the people of Nottingham that their ancestors were never really conquered by any one. The weaving of laces came about here in this way: The half or wholly savage women sitting at the mouths of these caves and holding their threads against the sun with the darkness behind them could see the fine threads better, and so could do finer and better work than any other women in western Europe. And their immunity from conquest and consequent interruption in their peculiar industry fastened it here and kept it well forward.--Joaquin Miller, The Independent.