Atal, however, did not know how to find Ngranek on its isle of Oriab; and recommended that Carter follow the singing Skai under its bridges down to the Southern Sea; where no burgess of Ulthar has ever been, but whence the merchants come in boats or with long caravans of mules and two-wheeled carts. There is a great city there, Dylath-Leen, but in Ulthar its reputation is bad because of the black three-banked galleys that sail to it with rubies from no clearly named shore. The traders that come from those galleys to deal with the jewellers are human, or nearly so, but the rowers are never beheld; and it is not thought wholesome in Ulthar that merchants should trade with black ships from unknown places whose rowers cannot be exhibited.