I tell this tale, as also that other about the exchange of hearts, partly to suggest that Liehtse's China may have had the actuality, or at least a reminiscence, of scientific knowledge since lost there, and only discovered in Europe recently. In the same way one finds references to automatic oxen, self-moving chariots, traveling by air, and a number of other things which, as we read of them, sound just like superstitious nonsense. There are old Chinese drawings of pterodactyls, and suchlike unchancey antediluvian wild fowl. _Argal,_ (you would say) the Chinese knew of these once; although Ptero and his friends have been extinct quite a few million years, one supposes. Or was it superstition again? Then why was it not superstition in Professor So-and-so, who found the bones and reconstructed the beastie for holiday crowds to gaze upon at the Crystal Palace or the Metropolitan Museum? Knowledge does die away into reminiscence, and then into oblivion; and the chances are that Liehtse's time retained reminiscences which have since become oblivion-hidden;--then rediscovered in the West.--But I tell the tale also for a certain divergence marked in it, between Taoist and Confucian thought. Laotse would have chuckled over it, who brooded much on 'self-emptiness' as the first step towards illumination. Confucius would have allowed it; but it would not have occurred to him, unsuggested. Now here is something still further from Confucianism; something prophetic of later Taoist developments, though it still contains Laotse's thought, and--be it said--deep wisdom. Fan Tsu Hua was a bully and a charlatan, who by his trickery had won such hold over the king of Tsin that anyone he might recommend was surely advanced to office, and anyone he cried down would lose his all. So it was said he had magic to make the rich poor and the poor rich. He had many disciples, who were the terror of the peaceably disposed. One day they saw an old weak man approaching, 'with weather-beaten face and clothes of no particular cut.' A chance for sport not to be neglected, they thought; and began to hustle him about in their usual fashion, 'slapping him on the back, and what not.' But he--Shang Ch'iu K'ai was his name--seemed only full of joy and serenity, and heeded nothing. Growing tired of their fun at last, they would make an end of it; and led him to the top of a high cliff. "Whoever dares throw himself over," said one of them, "will find a hundred ounces of silver," which certainly he had not had with him at the top, and none of them had put there.