The main islands of Ceann Ear, Ceann Iar and Shivinish are all linked at low tide. It has been claimed that it was at one time possible to walk all the way to Baleshare, and on to North Uist, five miles away at low tide. In the 17th century, a large tidal wave is said to have washed this route away. The islands of the group tend to be low-lying and sandy, subject to intense coastal erosion. Not unlike the Isles of Scilly it is possible that Ceann Iar, Shivinish and Ceann Ear formed a single body of land within historic times, and that their land area has greatly decreased due to overgrazing, sea inundation, and wind erosion. Smaller islands in the group include Deasker, Shillay and Stocaigh.
History
The islands have been uninhabited since 1942, but were populated by up to 100 people for centuries prior to 1810. They were originally abandoned due to overgrazing, but were resettled by 1841 in the wake of the Highland Clearances. The 19th century census records for the islands show a fluctuating population, from 39 people in 1841 up to 140 people at their peak population in 1891. Shillay is the location of Monach Lighthouse, built by David and Thomas Stevenson in 1864. The lighthouse was closed in 1942 but, following the sinking of the oil tanker MV Braer in 1993, a new and much smaller lighthouse was built in 1997. This had a range of ; when a range of was deemed necessary, the new lighthouse was shut down in 2008 and the old lighthouse recommissioned with a new optic. Like all British lighthouses it is now unmanned and fully automated. In 2007 renovations of the old schoolhouse were completed, enabling visitors to stay on the island, and learn about its history and wildlife. The old Heisgeir mailboat has also been restored at the Grimsay boatshed. The 28-foot motorised open wooden boat was built circa 1932 for the last family to leave the Monach Islands, and had lain unused at Lochmaddy before being rescued by the local history society.
sympathiser James Erskine, Lord Grange, had his wife Rachel kidnapped and abandoned on the Monach Isles between 1732 and 1734. At the time the islands were owned by Sir Alexander MacDonald of Sleat and she was housed with his tacksman, another Alexander MacDonald and his wife. When Lady Grange complained about her condition, she was told by her host that he had no orders to provide her either with clothes, or food other than the normal fare he and his wife were used to. She lived in isolation, not even being told the name of the island where she was living, and it took her some time to find out who her landlord was. She was there until June 1734 when John and Norman MacLeod from North Uist arrived to move her on. They told her they were taking her to Orkney, but she was taken to Hirta where she lived from 1734-42 before being taken to Skye where she died after a failed rescue attempt.
