In 1846 this fort was barely above the water.
Still farther out beyond James Island, and separated from it by a wide space of salt marsh with crooked channels, was Morris Island, composed of the sand-dunes thrown up by the wind and the sea, backed with the salt marsh.

On this was the lighthouse, but no people.
On the left, looking down the bay from the Battery of Charleston, was, first, Castle Pinckney, a round brick fort, of two tiers of guns, one in embrasure, the other in barbette, built on a marsh island, which was not garrisoned.

Farther down the bay a point of the mainland reached the bay, where there was a group of houses, called Mount Pleasant; and at the extremity of the bay, distant six miles, was Sullivan's Island, presenting a smooth sand-beach to the sea, with the line of sand-hills or dunes thrown up by the waves and winds, and the usual backing of marsh and crooked salt-water channels.
At the shoulder of this island was Fort Moultrie, an irregular fort, without ditch or counterscarp, with a brick scarp wall about twelve feet high, which could be scaled anywhere, and this was surmounted by an earth parapet capable of mounting about forty twenty-four and thirty-two pounder smooth-bore iron guns.

Inside the fort were three two-story brick barracks, sufficient to quarter the officers and men of two companies of artillery.
At sea was the usual "bar," changing slightly from year to year, but generally the main ship-channel came from the south, parallel to Morris Island, till it was well up to Fort Moultrie, where it curved, passing close to Fort Sumter and up to the wharves of the city, which were built mostly along the Cooper River front.
Charleston was then a proud, aristocratic city, and assumed a leadership in the public opinion of the South far out of proportion to her population, wealth, or commerce.

On more than one occasion previously, the inhabitants had almost inaugurated civil war, by their assertion and professed belief that each State had, in the original compact of government, reserved to itself the right to withdraw from the Union at its own option, whenever the people supposed they had sufficient cause.