Phyllis Pearsall published the first edition of the London A-Z street atlas, revolutionizing urban navigation and founding the Geographers' A-Z Map Company.
In 1936, Phyllis Pearsall published the first edition of the A-Z Atlas of London, later known simply as the London A-Z. According to the popular (though somewhat mythologized) account, Pearsall found existing London maps outdated and confusing after getting lost trying to reach a party using an old 1919 Ordnance Survey map. She resolved to walk the length of London's streets herself, reportedly covering some 3,000 miles on foot, rising at 5 a.m. to survey and catalogue over 23,000 streets.
Drawing on her father's cartographic legacy and her own artistic training, she compiled, drew, and published the atlas independently after larger publishers declined it. She founded the Geographers' A-Z Map Company to print and distribute it, reportedly delivering early copies herself to bookshops, including via a barrow to W.H. Smith's Victoria branch.
The A-Z became an essential tool for Londoners, taxi drivers, and visitors alike, and its format and branding became synonymous with British street mapping for decades, long before satellite navigation and smartphone apps existed. It filled a genuine gap in the market and became a cultural institution.
This achievement is historically significant as an example of female entrepreneurship and technical achievement in a field entirely dominated by men, cementing Pearsall's legacy as the visionary founder of one of Britain's most enduring mapping companies.