"There were even books with advice on how to refine your letter-writing style." - ROMAN MARS, The Revolutionary Post, 99% Invisible #99PercentInvisible #99pi #TheRevolutionaryPost #NationalLetterWritingDay #RomanMars

"The post office created America." - WINIFRED GALLAGHER, The Revolutionary Post, 99% Invisible #99PercentInvisible #99pi #TheRevolutionaryPost #WorldPostDay #WinifredGallagher

"Russell's competing service was called the Pony Express." - ROMAN MARS, The Revolutionary Post, 99% Invisible #99PercentInvisible #99pi #TheRevolutionaryPost #PonyExpressDay #RomanMars