https://www.lib.cam.ac.uk/collections/departments/rare-books/rare-books-collections/morison-collection how do I access this collection?
@ionchy I wonder if https://idiscover.lib.cam.ac.uk/permalink/f/t9gok8/44CAM_ALMA21551733470003606 might also be a reasonable lead.
@lenary I've checked with someone who owns a copy and it doesn't have it, this only goes up to S10640
I'm chasing down a final lead. There's one more mathematical signs catalogue, "List of mathematical characters" from 1970, which they have in that collection