I posses a pdf file named "Judo Gokui Dokushu Zukai Okuden 1913 柔道極意独習 図解奥伝" which seems to be an old Judo manual with some nice illustrations. It gave a nice insight into the way techniques were performed back in the day so I was wondering if there are similar, possibly older, manuals out there. Also, which would be the oldest know Judo manual with illustration or pictures for that matter?