The Edge Hill, Shakemantle, and Perseverance mines were opened in 1829 and operated as a combined unit, which also included Buckshaft and St Annal’s. They ceased operations in 1899. The interconnected workings of these mines span over 9 miles of main headings. In the Shakemantle Mines, there are four levels driven into the Crease Limestone, with two cross-cuts accessing a vein of ore in the Drybrook Sandstone. Levels No. 1 and 2 link with the Buckshaft Shaft and St Annal’s Shaft. Level No. 3, starting at approximately A 10 feet, extends northwards from an incline adjacent to the Shakemantle shafts for 12,600 feet, completed in 1886. This incline connects Levels 2, 3, and 4. A cross-cut from the bottom of the Buckshaft Shaft intersects with the level 90 feet away. Level No. 4, situated 140 feet below sea level, runs northwards from the Shakemantle Deep Shaft for 7100 feet. While 4,900 feet were productive, the final 2,200 feet, driven in 1895, yielded no ore. The total output of the Shakemantle mines between 1841 and 1899 amounted to 1.65 million tons of ore.