When seen in the guise of the four apocalyptical animals, they belong to a later period.
Hildegarde replied in an obscure, apocalyptical language: "In the mysteries of the true wisdom have I seen and heard this."
Doubtless these are only a few of the great number of apocalyptical books which those ages produced.
And the case is precisely similar when an inspired writer uses a peculiar form of literature like the apocalyptical writings.
All this wild guessing arises from ignorance of the essential character and purpose of the apocalyptical writings.