On the spikes driven into the Horse, Campbell compares the Norse story of "Dapple-grim" and the Horse sacrifice of the Mahabharata. On the building of the Magic Castle, Campbell remarks: "Twashtri was the Carpenter of the Vedic gods: can this be his work?"
On the Horse's head being struck off Campbell comments: "This was the last act in the Aryan Horse's sacrifice, and the first step in the Horse apotheosis."
_Remarks._--Campbell has the following note at the end of the tale, from which it would seem that in 1870 at least he was very nearly being an _Indiamaniac_.
"So ends this horse-riding story. Taking it as it is, with the test of language added, nothing short of an Asian origin will account for it. A Gaelic riddle makes 'a black horse' mean the invisible wind, and a theorist might suppose this horse to be the air personified. As Greece is mentioned, he might be Pegasus, who had to do with wells. But he had wings, and he was white, and there is nothing in classical fable like this Atlantic myth. 'The enchanted horse' of Arabian Nights was a flying machine, and his adventures are quite different. This is not the horse of Chaucer's Squire's Tale. He is more like 'Hrimfaxi,' the horse of the Edda, who drew the car of Nött in heaven, and was ridden round the earth in twelve hours, followed by Dagr and his glittering horse Skinfaxi. The black horse who always arrives at sunrise is like the horse of night, but there is no equivalent story in the Edda. 'Dapple-grim' in Norse tales is clad in a spiked bull's hide, and is mixed up with a blazing tar-barrel, but his adventures won't fit, and he was grey.
"The story is but an imperfect skeleton. The cup was to give strength; he had to open seven gates after he got the cup, but it does nothing. The hood is to hide with; he went in and out of the palace unseen after he had got the hood, but it plays no part. The light shoes were the shoes of swiftness of course, but they never showed their paces. Baldr's horse was led to the funeral pile with all his gear; and Odin laid the gold ring Draupnir on the pile. Such rites might account for the ring in the blazing lake. Hermothr's ride northwards and downwards to the abode of Hel to seek Baldr, his leap over the grate, and his return with the ring (Edda 25), might account for one adventure.