The Conspiracy of Pontiac, a highly-colored narrative in two volumes appearing in 1851, marks the first stage of his historical writing. Then came the tragedy of shattered health, and for fourteen years Parkman fought for life and sanity, and produced practically nothing. He had had to struggle from his college days with an obscure disorder of the brain, aggravated by the hardships of his Oregon Trail journey, and by ill-considered efforts to harden his bodily frame by over-exertion. His disease took many forms--insomnia, arthritis, weakness of sight, incapacity for sustained thought. His biographer Farnham says that "he never saw a perfectly well day during his entire literary career." Even when aided by secretaries and copyists, six lines a day was often the limit of his production. His own Stoic words about the limitations of his eyesight are characteristic: "By reading for one minute, and then resting for an equal time, this alternate process may gradually be continued for about half an hour. Then, after a sufficient interval, it may be repeated, often three or four times in the course of the day. By this means nearly the whole of the volume now offered has been composed." There is no more piteous or inspiring story of a fight against odds in the history of literature. For after his fortieth year the enemy gave way a little, and book after book somehow got itself written. There they stand upon the shelves, a dozen of them--The Pioneers of France, The Jesuits in North America, La Salle, The Old Régime, Frontenac, Montcalm and Wolfe, A Half-Century of Conflict--the boy's dream realized, the man's long warfare accomplished. The history of the forest, as Parkman saw it, was a pageant with the dark wilderness for a background, and, for the actors, taciturn savages, black-robed Jesuits, intrepid explorers, soldiers of France--all struggling for a vast prize, all changing, passing, with a pomp and color unknown to wearied Europe. It was a superb theme, better after all for an American than the themes chosen by Prescott and Ticknor and Motley, and precisely adapted to the pictorial and narrative powers of the soldier-minded, soldier-hearted author.