The Gryphon is a winged and four-footed animal born in high northern parts or the mountains, by each part of their body they are lions, only by their wings and head are they similar to eagles. They are very hostile to horses, and they tear living men to pieces, as Isidore says in book 12 [Etymologies 12.2]. They are so hostile to horses, as says Hugustio, that they would snatch armed horsemen with one high into the air. as says the gloss on Deuteronomy 14[:12]. Moreover, gryphons guard the mountains, in which there are precious gems, like emeralds and jaspers, and they do not allow them to be borne away. Thus says Isidore in [Etymologies] book 14 chapter 3.

original latin

Partes quaedam in Scythia auro et gemmis affluunt, sed gryphorum immanitate accessus hominum est rarus. Ibi smaragdi optimi et crystalli etc. Tam magnos habent ungues et tam amplos, quod inde fiunt scyphi, qui mensis Regum apponuntur.