Collections formed by a certain nobleman who had travelled in Eastern Europe, Western Asia and Egypt - possible Breidenbach, an account of whose travels in the Levant was printed at Mentz in 1486 - it is really a medical treatise, and its zoological portion is mainly an abbreviation of the writings of Albertus Magnus, with a few interpolations from Isidorus of Seville (who flourished in the beginning of the 7th century, and was the author of many works highly esteemed in the middle ages) and a work known as Physiologus.
For several centuries it was wholly lost sight of, and it was not till the 13th century that it was rediscovered through the agency of Robert Grosseteste, bishop of Lincoln, who translated it into Latin, under the misconception that it was a genuine work of the twelve sons of Jacob, and that the Christian interpolations were a genuine product of Jewish prophecy.
To Grabe, Schnapp and Conybeare belongs the credit of showing that the Christian elements were interpolations - to Conybeare especially of the three, since, whereas the two others showed the high probability of their contention on internal evidence, Conybeare proved by means of the Armenian Version that when it was made many of the interpolations had not yet found their way into the text.
This book was published with, and as an introduction to, the three principal works of Joachim, in which the Spirituals had made some interpolations.'
Thrasher, with interpolations, New York, 1856), are indispensable.