Phyllis Isobella Pearsall was born Phyllis Isobella Gross on 25 September 1906 at Court Lane Gardens in Dulwich Village, south-east London. Her father, Alexander Gross, originally Grosz, was a Hungarian-Jewish immigrant who had come to Britain around the turn of the century, partly to avoid conscription in the Austro-Hungarian Empire. Her mother, Isabella Crowley, often called Bella, was of Irish and Italian Catholic background, a suffragette and playwright whose play Break the Walls Down was staged at the Savoy Theatre in 1913. The couple had eloped to Gretna Green against her parents’ wishes. Phyllis’s older brother, Anthony Gross, later became a well-known painter and official war artist.
The household was for a time prosperous. In 1908 Alexander and Bella founded Geographia Ltd, a map-publishing firm that operated from offices near the Strand and later in Fleet Street, producing atlases, war maps and aviation charts. Phyllis was educated at Roedean, the girls’ boarding school near Brighton. That security did not last. Around 1920 her parents separated, her father’s business collapsed and he was declared bankrupt, and he left for the United States, where he rebuilt a cartographic career in New York. Phyllis left Roedean at about fourteen. She spent much of her late teens in France, living frugally, teaching English, writing, painting and studying at the Sorbonne. The instability of those years shaped a practical independence that later served her in business.
In the mid-1920s she returned to England and met Richard Pearsall, an artist and friend of her brother. They married in 1927 or 1928 and travelled in Europe. She painted portraits and, with Richard, published Castilian Ochre, an account of travels in Spain, in 1934. The marriage ended in the mid-1930s. She returned to London intending to make a living as a portrait painter, working from modest rooms and taking commissions where she could find them.
The story she later told of the A-Z begins in that period. She said she became lost on the way to a party in Belgravia because the best street map she could find was many years out of date, London having grown rapidly between the wars. Whether the lost evening was quite as she described, or whether the impulse also came from her father’s trade and from selling his maps, the decision that followed was real. She set out to produce a portable, indexed street atlas of the expanding metropolis, one that could be carried in a pocket or bag rather than unfolded into an unmanageable sheet.
Her own account, repeated in interviews and in her later memoir, was that she rose at five in the morning, worked eighteen-hour days, and walked some 3,000 miles to check the names of about 23,000 streets, recording house numbers along main roads as she went. That claim became the central legend of the A-Z. Later researchers and map historians have treated it with caution. The sheets were largely drawn from existing Ordnance Survey mapping, updated with information from London County Council planning offices, and draughtsmen associated with her father’s business, including a cartographer remembered as Mr Fountain and an assistant named James Duncan, did much of the compilation. Indexed London street atlases already existed; Bartholomew’s Reference Atlas of London and Suburbs had been available since 1908. The first A-Z’s boast of thousands more streets than any rival was overstated. What she did emphasise, and what distinguished the book in use, was the combination of a clear index, a compact book format, and house numbers on principal roads. The walking story may have been exaggerated, but the editorial labour and the commercial risk were not.
Publishers rejected the project. In 1936 her father set up the Geographers’ Map Company in High Holborn, with shares divided between Phyllis and her brother Anthony. She took charge of the London atlas. Alexander wanted it called the OK atlas; she changed the title at the last moment to A to Z, or A-Z. Ten thousand copies were printed. The first run was imperfect: cards for streets beginning with T were knocked out of a window and not all recovered, so Trafalgar Square was missing from the index. She took the books herself to Hatchards, Selfridges and Foyles and was turned away. At W. H. Smith an order for 1,250 copies eventually came through. She delivered them in a hand barrow borrowed from a nearby pub, on a sale-or-return basis. They sold. Further orders followed from railway station bookstalls, and F. W. Woolworth took several thousand. By the late 1930s the firm was issuing a growing list of titles, still largely hand-drawn.
The Second World War interrupted ordinary publishing. Maps were sensitive, paper was rationed, and London itself was being damaged and rebuilt. Pearsall kept the company alive through the war and the austerity that followed. In the decades after 1945 the A-Z became the ordinary reference for taxi drivers, delivery workers, salesmen and anyone trying to cross a city whose street plan defeated memory. New editions tracked slum clearance, new estates, ring roads and the slow erasure of bomb sites. The orange cover and the alphabetical index entered everyday British life in the way few reference books do. She remained closely involved with the firm, later known as the Geographers’ A-Z Map Company, for the rest of her working life, and was made a Member of the Order of the British Empire.
She never abandoned painting or writing. In 1986 she published From Bedsitter to Household Name, a personal history of the company’s first fifty years, which fixed the walking legend in print. She continued to work into old age from Shoreham-by-Sea in West Sussex, where she died on 28 August 1996 at the age of eighty-nine. The company she built outlasted her. The A-Z remained a standard London street atlas through the late age of paper maps and into the early years of satellite navigation, and the brand still publishes maps.
The fair assessment of her achievement sits between the romance and the revision. She did not invent the indexed London street map, and she did not single-handedly pace every pavement of the capital with a notebook. She did recognise a gap in a growing city, assemble existing surveys and professional draughtsmanship into a cheap portable book, finance and sell the first edition when established publishers would not, and then run the firm that kept the atlas current for decades. The missing Trafalgar Square cards, the wheelbarrow delivery to W. H. Smith, and the change from OK to A-Z are the sort of details that survive because they are specific. They also mark the difference between an idea and a product that reaches a station bookstall.
Her life before the atlas explains some of that persistence. Bankruptcy, a broken parental household, years of making do in France, a short marriage and an uncertain career as a portrait painter left her with little institutional backing and a habit of doing the next practical thing. The map business was also, in a direct sense, her father’s trade resumed under a new name. She acknowledged as much. What she added was the format, the index that ordinary users could work, the willingness to print before she had orders, and the long attention required to revise a city that does not stay still. For generations of Londoners the result was not a legend but a book kept in a glove compartment or a coat pocket, opened at a damp street corner when the name on the sign did not match the route in mind.