Scariff Island (Irish: An Scairbh, meaning "Rugged", is located ~1 km from Deenish Island and ~7 km from Hogs Head, on the mainland.
Its area is 366 acres and its highest point is at 252 m.
On the summitl, there are remains of an ancient hermitage and, on the east side, ruins of a church.
In 1837 only one family lived on Scariff; their main work was caring for cattle grazing on the island.
The 1911 census doesn't report any inhabitants for the island.
Note: that's Little Skellig (Irish: Sceilig Bheag) to the left of Scarriff Island.
Reference Wikipedia