Throughout most of its history, Cramond Island was used for farming, especially sheep-farming, and perhaps served as a fishing outpost as well. The island was once famous for its oyster beds, but these were destroyed due to overfishing. In the north west corner of the island there are remains of a jetty built with local stone which could be medieval in origin, while towards the centre of the island, half-hidden by a small wood there is the ruin of a stone-built farmstead. It appears on an Ordnance Survey map of 1853, but may be considerably older. It was occupied until the 1930s and sheep were still kept on the island as late as the 1960s.