Illustration featuring a system for filing notes, from "De arte excerpendi vom gelahrten Buchhalten liber singularis: quo genera & praecepta excerpendi, ab aliis hucusq; tradita omnia, novis accessionibus aucta, ordinata methodo exhibentur, et suis quaeque materiis applicantur...", 1689, by Vincent Placcius (1642-1699). *GC6.P6904.689d, Houghton Library, Harvard University