Eilean Musdile (Mansedale) is an islet to the south west of Lismore Island in the Inner Hebrides, near Oban.
The island lies in the entrance to Loch Linnhe, separated from Lismore by a sound 0.25 miles across.
It is a low-lying rock, ten acres (4.0 ha.) in area, with some grass on it.
CalMac ferries pass close to the island on their way from Oban to Craignure, Mull.
The lighthouse was built by Robert Stevenson in 1833 at a cost of £4,260 and initially showed a fixed white light.
Reference: Wikipedia