It is quite different with another poet of this period, a mysterious and intangible personage, whose very name is doubtful, whose writings had great influence, and that no one appears to have seen, concerning whom we possess no contemporaneous information. Like Gower, strong ties bind him to the past; but Gower is linked to Angevin England, and William Langland, if such be really his name, to the remote England of the Saxons and Scandinavians. His books are not made out of books; they are made of real life, of things seen, of dreams dreamt, of feelings actually experienced. He is the exact opposite of Gower, he completes Chaucer himself. When the "Canterbury Tales" are read, it seems as though all England were described in them; when the Visions of Langland are opened, it is seen that Chaucer had not said everything. Langland is without comparison the greatest poet after Chaucer in the mediaeval literature of England.[629] I. His Visions have been preserved for us in a considerable number of manuscripts. They differ greatly among each other; Langland appears to have absorbed himself in his work, continually remodelling and adding to it. No poem has been more truly lived than this one; it was the author's shelter, his real house, his real church; he always came back there to pray, to tell his sorrows--to live in it. Hence strange incoherencies, and at the same time many unexpected lights. The spirit by which Langland is animated is the spirit of the Middle Ages, powerful, desultory, limitless. A classic author makes a plan, establishes noble proportions, conceives a definite work, and completes it; the poet of the Middle Ages, if he makes a plan, rarely keeps to it; he alters it as he goes along, adding a porch, a wing, a chapel to his edifice: a cathedral in mediaeval times was never finished. Some authors, it is true, were already touched by classic influence, and had an idea of measure; such was the case with Chaucer, but not with Langland; anything and everything finds place in his work. By collecting the more characteristic notes scattered in his poem, sketch-books full of striking examples might be formed, illustrative of English life in the fourteenth century, to compare with Chaucer's, of the political and religious history of the nation, and also of the biography of the author. Allusions to events of the day which abound in the poem enable us to date it. Three principal versions exist,[630] without counting several intermediate remodellings; the first contains twelve cantos or _passus_, the second twenty, the third twenty-three; their probable dates are 1362-3, 1376-7, and 1398-9.[631]