With great activity and energy, therefore, they betook themselves to the fortification of every assailable point. With patriotic disinterestedness, the citizens demolished their valuable store-houses on the wharves to supply materials for defence. Streets were barricaded, and intrenchments erected along the shore. Even windows were stripped of their weights, to supply the demand for bullets. The inhabitants generally came to the work of defence, and scarcely a man on the ground could be discovered without a spade, a pickaxe, or other implement of work. Even the blacks from the city, and for miles in the country, were employed, and seemed animated with the enthusiasm and zeal of their masters. The commanding general was Major-general Lee, who, having been appointed by congress to the command of the southern forces, and possessing the entire confidence of the troops and of the people, was enabled to carry to completion the various works of defence, which his knowledge and skill had decided to be important. Governor Rutledge, also a man of great influence in the province, cöoperated with General Lee, in all his measures of defence, and by his example and exhortations essentially contributed to the happy results which followed. At the distance of six miles from the point of land formed by the confluence of the two rivers, Ashley and Cooper, and on which Charleston is built, lies _Sullivan's island_. It commands the channel which leads to the port. The due fortification of this point was a matter of great moment. The outline of a fort had already been marked out, to complete which, Colonel William Moultrie, a singularly brave and accomplished officer, was dispatched early in March. Palmetto trees, which from their soft and spongy texture, were admirably calculated to deprive a ball of its impetus without causing splinters, had been cut in the forest, and the logs in huge rafts lay moored to the beach. "Ignorant of gunnery, but confident in their own resources, and nerved with resolute courage, Moultrie and his coadjutors, hardy sons of the soil, heaved those huge logs from the water, and began the work. A square pen was built, with bastions from each angle, capable of covering a thousand men. The logs were laid in two parallel rows, and sixteen feet apart; bound together with cross-timbers dove-tailed and bolted into logs, and the wide space filled with sand. When completed, it presented the appearance of a solid wall, sixteen feet wide; but its strength was yet to be tested. Behind this, Moultrie placed four hundred and thirty-five men, and thirty-one cannon, some of them twenty-sixes, some eighteens, and the rest of smaller caliber--throwing in all five hundred and thirteen pounds.