smithsonianlibraries: Wondering if this doodle is as old as the book it’s doodled in? If so, i
smithsonianlibraries: Wondering if this doodle is as old as the book it’s doodled in? If so, it’s pushing 500 years… The doodle is found in the back of a handwritten manuscript copy of the complete text of Boethius’ De institutione arithmetica from the 15th century. -- source link