A curious account of a subterranean garden formed at the bottom of the Percy Main Pit, Newcastle, by the furnace-keeper, was lately communicated to the Caledonian Horticultural Society. The plants are formed in the bottom of the mine by the light and radiant heat of an open stove, constantly maintained for the sake of ventilation. The same letter communicated an account of an extensive natural hot-bed near Dudley, in Staffordshire, which is heated by means of the slow combustion of coal at some depth below the surface. From this natural hot-bed, a gardener raises annually crops of different kinds of culinary vegetables, which are earlier, by some weeks, than those in the surrounding gardens.

— Curiosities for the Ingenious, 1825