Most of the stone for the construction was obtained locally. Serpentine and other local stone, it was suggested, was obtained from a site supposedly in the Cove itself known locally as the "Devils Apron Strings", a triangular pyramid of broken rock material from the cliffside. (The earliest reference to a site called the "Devils Apron Strings" was recorded in a book called "A week at the Lizard" by Rev Johns some 44 years earlier and is based on a story in Cornish Folklore, actually describing it as being near a cliff fall of Serpentine near the Rill, Kynance). The Granite came from the West of England Granite Quarries at Penryn, and 2000 tons of Portland cement was used in the construction.