Strip away the tartan and the titles and Mathers' concrete legacy is a shelf of translations that furnished the modern occult library. The Kabbalah Unveiled, his 1887 Englishing of Knorr von Rosenroth's Latin Kabbala Denudata, gave anglophone occultism its working text of three Zoharic treatises, wrapped in an introduction whose diagrams and vocabulary a century of students absorbed. The Key of Solomon the King, edited from British Museum manuscripts in 1889, standardised the most famous grimoire's pentacles and preparations.
The Book of the Sacred Magic of Abramelin the Mage, translated in 1897 from a French manuscript in the Arsenal library, taught a method, the long retreat to attain the knowledge and conversation of the guardian angel, that Crowley placed at the centre of his own system; Mathers could not know that his French exemplar was a flawed and abridged descendant of fuller German texts, so the version that shaped a tradition preserves the manuscript's errors, including corrupted word squares that later editions repair. He also assembled the Golden Dawn's own curriculum, welding kabbalah, tarot, geomancy, alchemy and Enochian material into a single graded synthesis whose tables of correspondences remain the lingua franca of Western magic. Whatever is thought of Mathers as a chief, as translator and synthesist he decided, more than any contemporary, which books the revival would actually read.