Note 041
From Chapter 59 of the Decline & Fall

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).