On 26 December 1900, the vessel Hesperus arrived at Eilean Mor in the remote Outer Hebrides with relief lighthouse men and fresh provisions. Staffed by three keepers, the lighthouse had been in operation for a year, but it had been noted that no light had been seen from Eilean Mor for ten days. Upon arrival, the superintendent, Robert Muirhead, found the lighthouse to be completely deserted, and a subsequent searchof the surrounding island failed to show any sign of what happened to the keepers. The last entry in the lighthouse logbook had been made on 15 December and contained a number of st.Abstract: On 26 December 1900, the vessel Hesperus arrived at Eilean Mor in the remote Outer Hebrides with relief lighthouse men and fresh provisions. Staffed by three keepers, the lighthouse had been in operation for a year, but it had been noted that no light had been seen from Eilean Mor for ten days. Upon arrival, the superintendent, Robert Muirhead, found the lighthouse to be completely deserted, and a subsequent search of the surrounding island failed to show any sign of what happened to the keepers. The last entry in the lighthouse logbook had been made on 15 December and contained a number of st