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Extraordinary site about paleography (Paleography is the art of analysing and reading handwriting. Some would call it a science, and to a degree it has acquired a veneer of scientific style, classification and ordering, but ultimately it involves one human individual attempting to understand the unique efforts at communication of another. This is fundamentally an art, with some scientific props. from http://medievalwriting.50megs.com/writing.htm):


http://www.bilkent.edu.tr/~tdavid/courses/hist509.htm

here I found among other interesting links a link to

Cappelli, Adriano, Lexicon Abbreviaturarum (Leipzig, 1928)

Lindsay, W. M., Notae Latinae (Cambridge, 1915)

I highly recommend them for those interested in paleography