During the siege of Charleston, in May, 1780, the grammar school at Salem, on Black river, where I had been placed by my father, Major JOHN JAMES, broke up; and I was compelled to abandon my school boy studies, and become a militia man, at the age of fifteen. At that time of life it was a great loss; but still I was so fortunate as to have General MARION as my commander, and my much honoured father, who was a sincere christian, as my adviser and protector. I do not intend to write a history of my own life; but it was thus, that I became in a great measure an eye witness of the scenes hereafter described; and what I did not see, I often heard from others in whom confidence could be placed. I felt an early inclination to record these events; but Major WEMYSS burnt all my stock of paper, and my little classical library, in my father's house; and, for two years and a half afterwards, I had not the common implements of writing or of reading. This may appear strange at present; but it is a fact, that even our general, when sending out a patrole, would request the officer to try to get him a quire of paper. After the war, other active pursuits prevented me from indulging my inclination; and the public attention, being long fixed upon the bloody wars and great battles in Europe, had lost all relish for our revolutionary history, and its comparatively little conflicts. However, when Dr. RAMSAY announced that he was about to publish his history of South Carolina, I hastily sketched out from memory a short history of MARION'S brigade, for him; which he inserted in fifteen pages of his first volume. This brings it down no lower than the arrival of General GREENE in South Carolina. Fortunately the events of the late war revived the national spirit, and with that a taste for our own history; by it too, my inclination was renewed to communicate that of MARION'S brigade. However, I still wanted materials to confide in more certain than memory. The last year I happened to mention my wish to Mr. RICHARD SINGELLTON, of Colleton, son-in-law of Major JOHN POSTELL, and he obligingly placed in my hands a bundle of original letters from General MARION to that distinguished officer. Not long after I heard that the late General PETER HORRY had preserved copies of General MARION'S correspondence with General GREENE and other officers; and I applied to his executor, Mr. JAMES GUIGNARD, who very politely placed five duodecimo volumes in my hands, closely written by the general. The originals were left by General HORRY with the Rev. M. L. WEEMS, but it appears he made no use of them in his life of MARION. The dates and facts stated in these copies agree pretty well with the account in the history of South Carolina by Dr. RAMSAY, and General MOULTRIE'S memoirs of the American revolution.