6' N., and longitude 74 deg 26' W., and is an irregularly shaped white sandstone islet in about the middle of the great Bahama Bank.

The space occupied by the whole group is shaped like an irregular triangle extending from the Navidad Bank in the Caribbean Sea at the south-east corner, to Bahama Island in Florida Strait on the north, about 200 miles.

The south side trends west by north for 600 miles, and the north side north-west by north 720 miles.

Most of the islands and small rocks in this group, called Keys or Cays, are very low, and rise only a few feet above the sea; the highest is about 400 feet high.

They are generally situated on the edge of coral and sand banks, some of which are of a very dangerous character.