Beadcord
Beadcord is the 'braille' system of the Wise. It is a form of 'writing' which allows the Wise to use their only sense, touch, to read and 'write' texts without using their homunculi as intermediaries.
Beadcord consists of beads threaded in sequence on to a cord. The resulting cord can be woven into brocades, tapestries and wound on to reels to form books. The Library of the Wise consists of a large collection of these books which are stored and catalogued on specially constructed, portable 'benches'.
Beads are distinguished by shape, texture and even by how cold or warm they feel depending on the material from which they are made. The variety of materials used is consequently great: shell, amber, semi-precious stones, metals. The resulting jewelled and multicoloured strands would utterly confuse the sighted.
Beads used to encode particularly secret texts are often subtly shaped, textured so that even the Wise have to imbibe haptic increasing drugs to read them