(Barbatos, from Collin de Plancy's Dictionnaire Infernal: Paris, 1863)

"Barbatos, a great countie [count] or earle, and also a duke, he appeareth in Signo sagittarii sylvestris, [when the sun is in Sagittarius] with foure kings, which bring companies and great troopes. He understandeth the singing of birds, the barking of dogs, the lowings of bullocks, and the voice of all living creatures. He detecteth treasures hidden by magicians and inchanters, and is of the order of virtues, which in part beare rule: he knoweth all things past, and to come, and reconcileth friends and powers; and governeth thirtie legions of divels by his authoritie." (Reginald Scot, Discoverie of Witchcraft, page 218.)

The description in Mathers' edition of the Goetia differs in a couple of details from that of Scot. Mathers' description was taken from the Lemegeton in British Library Sloane Manuscript 2731. He recorded of this spirit: "he breaketh the Hidden Treasures open that have been laid by the Enchantments of Magicians." This indicates that Barbatos not merely locates treasures hidden by magic, but actually breaks the spells that concealed them and kept them safe. Also in that manuscript is written of Barbatos that he is "of the order of Virtues which some part bears Rule still," which is to say, this demon is not wholly corrupted by his fallen state. Mathers phrased it: "He is of the Order of Virtues, of which some part he retaineth still..."

It is not clear to me how Collin de Plancy translated the ability to understand the voices of birds into the musical notes of brass hunting horns. Perhaps Barbatos is said in some other description to be a hunter, or to give skill at hunting. He appears to be carrying a musket in the illustration.