Centuries and centuries of idealism have not failed to influence reality. In the most ancient regions of Tlon, the duplication of lost objects is not infrequent. Two persons look for a pencil; the first finds it and says nothing; the second finds a second pencil, no less real, but closer to his expectations. These secondary objects are called hronir and are, though awkward in form, somewhat longer. [...] Curiously, the hronir of second and third degree - the hronir derived from another hron, those derived from the hron of a hron - exaggerate the aberrations of the initial one; those of fifth degree are almost uniform; those of ninth degree become confused with those of the second; in those of the eleventh there is a purity of line not found in the original. The process is cyclical: the hron of the twelfth degree begins to fall off in quality. [...] Things became duplicated in Tlon; they also tend to become effaced and lose their details when they are forgotten. A classic example is the doorway which survived so long it was visited by a beggar and disappeared at his death. At times some birds, a horse, have saved the ruins of an amphitheater.