Various scientific and religious treatises were also written in prose; those of Richard Rolle, hermit of Hampole, count amongst the oldest and most remarkable.[678] We owe several to Chaucer; they pass unnoticed in the splendour of his other works, and it is only fair they should. Chaucer wrote in prose his tale of the parson, and his tale of Melibeus, both taken from the French, his translation of Boethius, and his treatise on the Astrolabe. His prose is laboured and heavy, sometimes obscure; he, whose poetical similes are so brilliant and graceful, comes to write, when he handles prose, such phrases as this: "And, right by ensaumple as the sonne is hid whan the sterres ben clustred (that is to seyn, whan sterres ben covered with cloudes) by a swifte winde that highte Chorus, and that the firmament stant derked by wete ploungy cloudes, and that the sterres nat apperen up-on hevene, so that the night semeth sprad up-on erthe: yif thanne the wind that highte Borias, y-sent out of the caves of the contree of Trace, beteth this night (that is to seyn, chaseth it a-wey, and discovereth the closed day): than shyneth Phebus y-shaken with sodein light, and smyteth with his bemes in mervelinge eyen."[679] Chaucer, the poet, in the same period of his life, perhaps in the same year, had expressed, as we have seen, the same idea thus: But right as whan the sonne shyneth brighte In march that chaungeth ofte tyme his face, And that a cloud is put with wind to flighte Which over-sprat the sonne as for a space, A cloudy thought gan thorugh hir soule pace, That over-spradde hir brighte thoughtes alle.[680] Accustomed to poetry, Chaucer sticks fast in prose, the least obstacle stops him; he needs the blue paths of the air. High-flying birds are bad walkers. II. Under a different form, however, prose progressed in England during the course of the fourteenth century. This form is the oratorical.