A Dundee firm built lime kilns on Lindisfarne in the 1860s, and lime was burnt on the island until at least the end of the 19th century. The kilns are among the most complex in Northumberland. Horses carried limestone, along the Holy Island Waggonway, from a quarry on the north side of the island to the lime kilns, where it was burned with coal transported from Dundee on the east coast of Scotland. There are still some traces of the jetties by which the coal was imported and the lime exported close by at the foot of the crags. The remains of the waggonway between the quarries and the kilns makes for a pleasant and easy walk. At its peak over 100 men were employed. Crinoid columnals extracted from the quarried stone and threaded into necklaces or rosaries became known as St Cuthbert's beads. The large-scale quarrying in the 19th century had a devastating effect on the interesting limestone caves, but eight sea caves remain at Coves Haven.