when he had described pavilions for them a little more , and the dragon-city in africa , and added , `` and in yutien , there were dragons who were merchants , and all of them had heaps of jewels : only tin and glass , laurence said , but they were very pretty anyway , and in africa they had gold enough to put it on all their crews , '' there were not many dragons who did not sigh at least a little , and those who had some little bit of treasure on them looked at it , and many of the rest looked at them , wistfully .