[Footnote 41: From the ambassador, William of Tyre (l. xix.
c. 17, 18,) describes the palace of Cairo. In the caliph's
treasure were found a pearl as large as a pigeon's egg, a
ruby weighing seventeen Egyptian drams, an emerald a palm
and a half in length, and many vases of crystal and
porcelain of China, (Renaudot, p. 536.)]