John Coulthart brings a link to “all 3,144 pages” of Man Myth Magic magazine, now on Archive.org. Actually more of a reference encyclopaedia, but issued in the once-popular (and apparently very profitable, when done right) British ‘collect the partwork’ manner. The work had a stellar contributor list which included Katharine Briggs for the folklore articles. Half way through the post we learn that the scans are of a “revised and reprinted” version, though it seems not much was changed.
The 21 volumes weigh in at just under 1Gb in a single PDF file.