NORTH ROCKS, (otherwise called St Patrick's rocks, from a seat of stone amongst them called St Patrick's chair, whence the rocks have taken this second name;) situated in the harbour of Donaghadee, in the county of Down, and province of Ulster, in Ireland. From north to south they are about two-thirds of a league, between which is clean good ground. But care must be taken of the fourth rock, on which many ships have perished: for it is overflowed by every tide, and no crew can save their lives if the wind blows high. This rock stands a full mile from the shore.