MOONDOG - Sea Horse
endpaper spread, Frame 56
今井 友次郎 (Imai Tomojiro), 電信暗号講義要領 (Lectures on essentials of telegraphic codes).
Tokyo: Waseda University, 1910
Imai authored several books on commercial practice. These include, in addition to the above, a cypher code (same publisher, 1908), and Business Forms (Yokohama : The Box of Curios Printing and Publishing, 1906).
For the moment — still landing — another endpaper abstraction.