President, 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 — mercury 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)
-
Lemegeton
, The Goetia: The Lesser Key of Solomon the King
— The Goetia, spirit 57
“The Fifty-seventh Spirit is Oso, Ose, or Voso. He is a Great President, and appeareth like a Leopard at the first, but after a little time he putteth on the Shape of a Man. His Office is to make one cunning in the Liberal Sciences, and to give True Answers of Divine and Secret Things; also to change a Man into any Shape that the Exorcist pleaseth, so that he that is so changed will not think any other thing than that he is in verity that Creature or Thing he is changed into. He governeth 30° Legions of Spirits, and this is his Seal, etc.”
Verbatim, cut from the 1904 text by script/extract_goetia.rb. Mathers' spelling and capitalisation are left exactly as printed.