Balam appears with the heads of a bull, a man and a ram, a serpent's tail and flaming eyes. So does Asmoday, at number thirty-two, in almost the same words.
Repetitions of this kind are the best internal evidence for how the catalogue was assembled, and there are more of them than a casual reading suggests. Three-headed spirits recur, Bael with toad, man and cat, Aim with serpent, man and calf. Riding a viper recurs. Bearing a viper recurs. Trumpets sounding before the spirit recur. Appearing first as a beast and then, at command, as a man is close to a standard formula. Telling of things past, present and to come is used again and again with no variation at all.
A text produced by a single imaginative author would be unlikely to duplicate a full description across two entries nineteen places apart. A text assembled from a stock of formulae, or copied from a source that was already doing so, would do exactly this.
The same conclusion falls out of the legion counts, where four values cover most of the catalogue, and out of the offices, which are drawn from a small pool and recombined.
None of this makes the Goetia less interesting. It makes it a different kind of object: not a record of encounters, but a compilation built from repeating parts, in which the individuality of any given spirit is often no more than a particular draw from a limited set. That is worth knowing before reading much into the specific attributes of any one of the seventy-two, including this one, and including the two that share a description.