The next step was to gather these early records from government archives, and from libraries public and private, on both sides of the Atlantic,--a task, as Parkman himself called it, "abundantly irksome and laborious." It extended over many years and involved several visits to Europe. It was performed with a thoroughness approaching finality. Already in the preface to the "Pioneers" the author was able to say that he had gained access to all the published materials in existence. Of his research among manuscript sources a notable monument exists in a cabinet now standing in the library of the Massachusetts Historical Society, containing nearly two hundred folio volumes of documents copied from the originals by expert copyists. Ability to incur heavy expense is, of course, a prerequisite for all undertakings of this sort, and herein our historian was favoured by fortune. Against this chiefest among advantages were to be offset the hardships entailed by delicate health and inability to use the eyes for reading and writing. Parkman always dictated instead of holding the pen, and his huge mass of documents had to be read aloud to him. The heroism shown year after year in contending with physical ailments was the index of a character fit to be mated, for its pertinacious courage, with the heroes that live in those shining pages. The progress in working up materials was slow and sure. "The Conspiracy of Pontiac," which forms the sequel and conclusion of Parkman's work, was first published in 1851, only five years after the summer spent with the Indians; fourteen years then elapsed before the "Pioneers" made its appearance in Little, Brown & Co.'s window; and then there were yet seven-and-twenty years more before the final volumes came out in 1892. Altogether, about half a century was required for the building of this grand literary monument. Nowhere can we find a better illustration of the French critic's definition of a great life,--a thought conceived in youth, and realized in later years. This elaborateness of preparation had its share in producing the intense vividness of Parkman's descriptions. Profusion of detail makes them seem like the accounts of an eye-witness. The realism is so strong that the author seems to have come in person fresh from the scenes he describes, with the smoke of the battle hovering about him and its fierce light glowing in his eyes. Such realism is usually the prerogative of the novelist rather than of the historian, and in one of his prefaces Parkman recognizes that the reader may feel this and suspect him. "If at times," he says, "it may seem that range has been allowed to fancy, it is so in appearance only, since the minutest details of narrative or description rest on authentic documents or on personal observation."