"Those who have put out the people's eyes reproach them of their blindness'' -- John Milton (1608-74)

It's certainly an eye-opening photograph: Sakuzaemon Kodama, professor of anatomy in the medical department of Hokkaido University in the 1930s, surrounded by shelfloads of skulls, racks of swords and other artifacts.

However, the fact that these are the skulls of Ainu people -- many of whom were not long dead when Kodama helped himself to their craniums -- makes the archive picture all the more arresting.