E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
called Christian Bones. It is said that the walls of Philadelphia, in Turkey, were built of the bones of Christians killed in the Holy Wars. This idle tale has gained credit from the nature of the stones, full of pores and very light, not unlike petrified bones. Similar incrustations are found at Knaresborough and elsewhere.