View of St Michael's Mount in Cornwall, and the adjacent coast, taken from the sea. There is also a plan of the coast of Cornwall from Penzance to Merazion. The rocky mount is about one mile in circumference. When the sea level is high, it becomes an Island, but at low tide, it is joined to the main land by a large beach of sand. The ancient priory and castle can just be seen on the summit. The surrounding bay is Mount's Bay. Daniel Defoe visited here in the early 18th century and commented ' Near Pensance, but open to the sea, is that gulph they call Mounts Bay, nam'd so from a high hill standing in the water, which they call St Michael's Mount, the seamen call it only the Cornish Mount; It has been fortify'd, tho' the situation of it makes it so difficult of access....it was once made a prison for prisoners of State, but now it is wholly neglected'.