Plymouth stone anchor
The Plymouth three-hole stone anchor is a Stone or Bronze Age anchor (also called a killick) found in the sea south of Plymouth Breakwater in England . This type of anchor was referred to as Byzantine Arabic by Honor Frost (1917-2010). They were found particularly in the eastern Mediterranean and the Black Sea, where they are called Apollonian anchors.
The hole at the top was used to attach a rope, while the pair of holes near the base were used to hold wooden pegs that dug into the seabed and provided support. The shape of the stone suggests that it was only roughly shaped as the sides are straighter and more even than the top or bottom. The anchor is unusual in that the top hole is roughly cut through the thinner area in the rock, while the two bottom holes are round and appear neatly drilled.
Another stone anchor was found in the shallow water between Penlee Point and Rame Head in 1988. The anchor is thinner at the top (25mm) and thicker at the base (45mm) and has three holes that are approximately 25mm in diameter. Chlorite slate was identified as the material .