This concise handbook of ritual magic appeared as an appendix of Agrippa’s Opera, following Agrippa’s Fourth Book of Occult Philosophy. The edition I used for the Latin text is Lyon 1600 (?). An English translation by Robert Turner was published in 1655, and appeared in a collection of esoteric texts along with Agrippa’s Fourth Book. Its attribution to the famous physician Peter de Abano (1250-1316) may be spurious, as his accepted works ‘betray no acquaintance with the occult sciences.’ Note however that Agrippa refers to de Abano in his Third Book as being his source for the Theban alphabet of Honorius of Thebes. The Heptameron (“seven days”) details rites for conjuring angels for the seven days of the week. It is heavily based on texts of the Solomon cycle, and in fact appears in the Hebrew Key of Solomon (Mafteah Shelomoh) fol 35a ff under the title the Book of Light (though without the Christian elements). It was also apparently one of the chief sources for the Lemegeton.