Marquis, 30 legions
Rank and legion count as the 1904 edition gives them. The legions come from the phrase that closes almost every entry; the rank comes from the book's own appendix, which classifies all seventy-two and states the metal each rank's seal is to be made in — silver for this one. The entries use rank words descriptively as well — Eligos appears 'in the form of a goodly Knight' and Barbatos comes 'with four noble Kings' — so a rank harvested from the prose would invent titles the book does not give. Only the appendix classifies.
Sources (1)
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Lemegeton
, The Goetia: The Lesser Key of Solomon the King
— The Goetia, spirit 69
“The Sixty-ninth Spirit is Decarabia. He appeareth in the Form of a Star in a Pentacle, at first; but after, at the command of the Exorcist, he putteth on the image of a Man. His Office is to discover the Virtues of Birds and Precious Stones, and to make the Similitude of all kinds of Birds to fly before the Exorcist, singing and drinking as natural Birds do. He governeth 30 Legions of Spirits, being himself a Great Marquis. And this is his Seal, which is to be worn, etc.”
Verbatim, cut from the 1904 text by script/extract_goetia.rb. Mathers' spelling and capitalisation are left exactly as printed.