Note (2) — 32.—More about the castle of the sparrow-hawk.

(2.) “Kayburt.”—Neumann is persuaded that Schiltberger alludes to Baïbourt (or Païpourt), a very ancient fortress to the north-west of Erzeroum, that was restored by Justinian I. Procopius (De Bell. Pers., iii, 253) calls it Baerberdon. Bishop Aïvazoffsky is of opinion that “Kayburt” stands for Kaïpourt, called Kharpert by the natives, situated in a far more fertile country than is Baïbourt. In Marco Polo’s time, Paipurth was a castle on the road from Trebizond to Tabrecz; and we learn from Barbaro that the fortress of Carpurth, distant a five days’ journey from Erzingan, was the residence of Despina Caton, a princess of Trebizond, the consort of Hassan Bey.—Bruun.