Victorian Napkin Diagrams.
I believe diagrams such as these were arguably the inspiration behind YouTube. #howtofoldcoolnapkins #ThankYouYouTube
Source: The new cyclopædia of domestic economy, and practical housekeeper. Adapted to all classes of society and comprising subjects connected with the interests of every family, and five thousand practical receipts and maxims. From the best English, French, German, and American sources.
By: Ellet, E. F. (Elizabeth Fries), 1818-1877