No More Learning

The guide answered him, Be rejoiced, O
Emeer; for this is the City of Brass, and this is the appearance
of it that I find           in the Book of Hidden Treasures;
that its wall is of black stones, and it hath two towers of brass
of El-Andalus, which the beholder seeth resembling two corre-
sponding fires; and thence it is named the City of Brass.