Several years afterward it occurred to the author to undertake a task which he ought to have commenced years before, viz. the composition of a historical memoir of the Mohawk Valley, which would embody those written and unwritten materials of history, now fast disappearing by the death of the actors in the scenes to be described, and the loss of papers and manuscripts, of which such reckless destruction is allowed in this country. In the progress of thought and investigation upon the subject, it was soon determined to embrace in the proposed memoir some biographical account of the Great Chief of the Six Nations, Joseph Brant—Thayendanegea; but there was yet another distinguished name, whose history and fame were intimately connected with the Mohawks, and whose character has neither been justly described nor well understood. The reader will probably anticipate the name, Sir William Johnson. By this time it was apparent that the work, if executed, must be more extended than had originally been contemplated; and a few slight preparations were made for its commencement ten years ago.

It was some time in the year 1829 that the design was abandoned. Calling upon his venerable friend Chancellor Kent, one morning, for the purpose of borrowing a rare volume of a still rarer history of the old French war of 1755-'63, the author was informed that his design had been anticipated by William W. Campbell, Esq., a young gentleman of promise who was just coming to the bar—a native of the country to be occupied as historic ground—and whose work was then nearly ready for the press. Under these circumstances, the project of the author was at once relinquished.

Mr. Campbell's book—"Annals of Tryon County,"—made its appearance in 1831; and was at once found valuable for its facts, and creditable alike to the industry and talents of an author, who, although then so young, possessed the enterprise to undertake the necessary labour, and the ambition to inscribe his name upon the roll of American historians. Still, the work was not a substitute for that which the author had proposed; its object was a more limited history, both of time and territory, than had been entertained in respect of the present work. Mr. Campbell's Annals, with the exception of a very few brief and partial sketches, embraced the history only of the war of the Revolution in that particular section of country, and had little to do with biography. The design of the author, enlarged by reflection and research, now began to comprehend a history of the Six Nations, and their wars with the French, Hurons, or Wyandots, and Adirondacks; the settlement of the country by the pale faces; a history of the French War, so far as that memorable contest was connected with the Indians and colony of New-York; together, or rather blended, with the Lives of Sir William Johnson and Joseph Brant. A work of this description seemed to be a desideratum in American history; and in the autumn of 1832, preparations for the undertaking were resumed, with what success will in part be seen in the sequel.

In the prosecution of the preliminary labour, efforts were made to procure materials from the survivors of the family of Sir William Johnson, residing in the Canadas. These efforts have thus far been attended with but partial success. From one of the grandsons, however, Mr. Archibald Johnson, a valuable manuscript volume has been procured, containing the private diary of Sir William during the Niagara campaign of 1759, in which General Prideaux fell, leaving the command of the army to the baronet, whose efforts were crowned with brilliant success. From among the papers of the late Lieut. Governor of New-York, John Taylor, in possession of his daughter, Mrs. Cooper, the author has fortunately obtained the manuscript of Sir William's official diary for the years 1757, 1758, and a part of the year 1759, together with a small parcel of other papers and letters. A few of the baronet's letters and papers are also yet extant, in the archives of the state at Albany. All these will afford materials for his proposed biography, and for other historical illustrations, of high value. Many of the baronet's papers were destroyed in the war of the Revolution; and many others, it is ascertained, are only to be found in England—to which country a special visit will probably be necessary for their consultation.

It will readily be perceived, that the proposed work embraces two epochs, between which there is a very natural, and even necessary, division. The first embraces the early history referred to, with a history of the French war, and the country, to the death of Sir William Johnson. The second division embraces the life of Joseph Brant, and the revolutionary, Indian, and Tory wars of the northern and western part of the State of New-York; and although anticipated, to a considerable extent, by Mr. Campbell, still the author entered the field of investigation with as much spirit as though it had not been historically traversed before. In the course of his labours he has visited the Mohawk Valley three several times with no other object. Ascertaining, moreover, that the venerable Major Thomas Sammons, of Johnstown, himself, with his father and two brothers, an efficient actor in the scenes of the Revolution, had for many years been collecting historical materials in that region, the author applied to him; and was so fortunate as not only to procure his collections, but to induce the old gentleman to re-enter the field of inquiry. By his assistance a large body of facts and statements, taken down in writing during the last thirty years, from the lips of surviving officers and soldiers, has been obtained for the present work. These documents have added largely to the most authentic materials of history, enabling the author to bring out many new and interesting facts, and to correct divers errors in the works of preceding writers, who have superficially occupied the same ground. In addition to these, the few remaining papers of the brave old General Herkimer, who fell at Oriskany in 1777, have been placed at the disposal of the author, by his nephew, John Herkimer, Esq. Still the work of Mr. Campbell has been found of great use, and by consent has been liberally drawn upon. In regard to some transactions, it was, indeed, almost the only authority; as in the cases of Cherry Valley, some of the transactions in the Schoharie Valley, and the exploits of Colonel Harper.

But this is not all. The author has visited Upper Canada, and Montreal and Quebec, in search of materials. Most luckily for the cause of historic truth, and the reputation of Joseph Brant, during his Canadian researches he became apprised of the fact, that the old Mohawk chief, himself a man of a pretty good English education, had left a large mass of manuscripts, consisting of his own speeches, delivered on many and various occasions, and a great number of letters addressed to him; together with copies of his own letters in reply, which he had preserved with equal industry and care. These papers were in the keeping of his youngest daughter, a lady of high respectability, aboriginal though she be, and eligibly married to William Johnson Kerr, Esq. of Wellington Square, Upper Canada. It was obvious that those papers must prove a rich mine for exploration; and an application from the author, through his friend the Hon. Marshall S. Bidwell, of Toronto, was most readily responded to by Mr. and Mrs. Kerr. The papers, it is true, were less connected than had been hoped; and by hundreds of references and allusions contained therein, it is obvious that large numbers of letters, journals, and speeches have been lost—past recovery. Still, those which remain have proved of great assistance and rare value.

To the kindness of Charles A. Clinton, Esq. the author has been indebted for access to the private papers of General James Clinton, his grandfather. In the composition of one portion of the present volume, these papers have been found of vast importance. General James Clinton was the father of the late illustrious De Witt Clinton, and the brother of Governor George Clinton. He was much in command in the northern department, and it was under his conduct that the celebrated descent of the Susquehanna was performed in 1779. His own letters, and those of his correspondents, have been of material assistance, not only in relation to that campaign, but upon various other points of history. It was among these papers that the letters of Walter N. Butler, respecting the affairs of Cherry Valley and Wyoming, were discovered.

In connexion with the history of the expedition of Sullivan and Clinton, just referred to, the author has likewise been favoured with the manuscript diary of the venerable Captain Theodosius Fowler of this city, who was an active officer during the whole campaign. In addition to the valuable memoranda contained in this diary, Capt. Fowler has preserved a drawing of the order of march adopted in ascending the Chemung, after the junction of the two armies, and also a plan of the great battle fought at Newtown by Sullivan, against the Indians and Tories commanded by Brant and Sir John Johnson; both of which drawings have been engraved, and will be found in the Appendix.

In the winter of 1775-'76, an expedition was conducted from Albany into Tryon County, for the purpose of disarming the Tories and arresting Sir John Johnson, of the particulars of which very little has hitherto been known. On application to the family of General Schuyler, it was ascertained that his letter books for that period were lost. After much inquiry, the necessary documents were obtained from Peter Force, Esq. at Washington.

The author has likewise been indebted to General Peter B. Porter, of Black Rock, for some valuable information respecting the character and some of the actions of Brant. General Porter was an early emigrant into the western part of the State, as an agent for the great landholder, Oliver Phelps; and the execution of his duties brought him into frequent intercourse with many of the chiefs and sachems of the Indians. Among these he became intimately acquainted with the Mohawk chief, between whom and himself a written correspondence was occasionally maintained for several years. Unfortunately, however, that correspondence, with other communications in his hand-writing, which Gen. Porter had taken some pains to preserve, was destroyed by one of the incursions of the enemy across the Niagara during the last war. Still, the General has supplied the author with several important reminiscences respecting the old chief, and one transaction of thrilling interest, heretofore entirely unknown.