The statement that Manuel transmitted the letter to the Emperor Frederick makes one wonder whether Anselm, Bishop of Havelberg and later of Ravenna, can have had anything to do with it. He was sent by Frederick on an embassy to Manuel in 1153, which seems to identify him with the author of a “_Liber de diversitate nature et persone proprietatumque personalium non tam Latinorum quam ex Grecorum auctoritatibus extractus_”--CUL 1824 (Qi. vi. 27), beautiful 13th century hand, fols. 129-76,--who states in his preface that he collected his Greek authorities in Constantinople where he was sent by Frederick on an embassy to Manuel, and on his return to Germany showed them to “_Petro venerabili Tusculano episcopo_.” [733] Such as Apocrisarius and Archimandrite, a word however not entirely unknown in the west; see Ducange. [734] “Cum enim hominem nos esse cognoscamus, te Graeculi tui Deum esse existimant, cum te mortalem et humanae corruptioni subiacere cognoscamus,” Zarncke (1879) 910. [735] For instance, the writer twice alludes to the square before Prester John’s palace where he watches the combatants in judicial duels or wager of battle, Zarncke (1879) 918, 919. [736] I have seen a copy in the British Museum (IA.8685), _De Mirabilibus Indiae_, where the account given Calixtus II of miracles of the Apostle Thomas is run together with the letter of Prester John. [737] Zarncke, 912; Digby 158, fol. 2v; BN 2342, fol. 191v; BN 3359, fol. 144v. [738] Zarncke, 912-913; MSS as before. This fountain of youth was little improved upon by another inserted later (Zarncke, 920-21; BN 3359, fol. 146v; not in the other two MSS), which one had to taste thrice daily on a fasting stomach for three years, three months, three weeks, three days, and three hours, in order to live and remain youthful for three hundred years, three months, three weeks, three days, and three hours. [739] Zarncke, 913; Digby 158, fol. 3r, etc. [740] Zarncke, 915; Digby 158, fol. 3v; BN 2342, fol. 192r; BN 3359, fol. 145r. It will be recalled that Charlemagne is said to have had such a garment. Pliny discussed both salamanders and asbestos but did not connect the two. Marco Polo, however, says (I 42, Yule (1903) I, 212-3), “The real truth is that the salamander is no beast, as they allege in our part of the world, but is a substance found in the earth.... Everybody must be aware that it can be no animal’s nature to live in fire, seeing that every animal is composed of all four elements.” Polo confirms, however, the report of robes made of incombustible mineral fibre and cleansed by fire. [741] Zarncke, 918; Digby 158, fol. 4r; BN 2342, fol. 192r; BN 3359, fol. 145v. [742] Zarncke, 919-20; Digby 158, fols. 4v-5r; BN 2342, fol. 192v; BN 3359, fol. 146r. [743] Zarncke, 920-22; Digby 158 fol. 5v; BN 2342, fol. 192v; BN 3359, fol. 146r-v. [744] Zarncke, 911. [745] _Ibid._, 913. For Michael Scot, see Chapter 51, page 324; for Thomas of Cantimpré, Chapter 53, Page 393.