The art on the outside
of folded maps.

Mid-century commercial printing did real illustration work that nobody kept. A folded gas-station map had a painted cover by a working illustrator. A state-park brochure had hand-drawn infographics. A dam dedication pamphlet opened to an inset panel rendered in tight watercolor. The art was as careful as anything in a magazine, but the paper went straight into a glove compartment and then a trash can.

Most of what’s in this archive is that illustration. The painted fronts of folded road maps, the inside spreads of promotional pamphlets, the decorative cartouches and inset panels filling the margins of working maps. Mostly Pacific Northwest. Mostly the 1950s and 60s. Mostly the anonymous work of staff illustrators at print shops and tourism bureaus.

Every scan is high resolution so brushstrokes, halftone dots, and pencil tracks stay readable at any zoom. Every item is researched against authoritative sources (Wikipedia, archive.org, HistoryLink, university digital collections), with inline citations on the historical claims. Numbered pin annotations call out details on each scan that are easy to miss. Treat the descriptions as a starting point; verify before you cite.