LONG-ISLAND, an island, in the parish of SKULL, Western Division of the barony of WEST-CARBERY, county of CORK, and province of MUNSTER, 4 miles (S. W.) from Skull, on the south-west coast; containing 259 inhabitants. It was formerly called Innisfadda, or the "Isle of Dogs," and it is traditionally stated that, in 830, such a violent tempest occurred that the sea broke over the island and forced it asunder into three parts. It is situated on a fine harbour of the same name, and forms one side of the entrance to Roaring-water bay: though not more than a quarter of a mile wide, it is nearly two miles in length, and comprises about 154 acres of land, chiefly under tillage and tolerably well cultivated by the spade. The substratum is clay-slate, in some places rising into rocky knolls, but even these produce good herbage; and corn and potatoes, more than sufficient for the support of the inhabitants, are produced, but fuel is extremely scarce: most of the men are engaged in fishing or as pilots. Here is a detachment from the coast-guard station at Crook-haven. The harbour is well sheltered, easy of access, and capable of receiving the largest ships, which may enter at either end of the island, care being taken to avoid a spit of sand extending in a northern direction more than half way across the channel, from about half a mile within the east end of the island: the Kings' sound is considered the safest entrance.