Marco,
That post by Ellie is about a different folio.
As it happens, I'd already described that folio which Ellie is talking about as depicting the world, but the spiral arms are the critical detail, and those I identify as rhumb-lines: that is the winds and/or stars used for the directions. Since none of them is emerging from the cardinal points, I take them as wind-rhumbs. First wrote about this on the old research blog, but it might be matter I've repeated on voynich.imagery.
That post by Ellie is about a different folio.
As it happens, I'd already described that folio which Ellie is talking about as depicting the world, but the spiral arms are the critical detail, and those I identify as rhumb-lines: that is the winds and/or stars used for the directions. Since none of them is emerging from the cardinal points, I take them as wind-rhumbs. First wrote about this on the old research blog, but it might be matter I've repeated on voynich.imagery.