Mogg's Cab Fare Distance Map and London Guide. Index to the Streets, Squares, and Cab Stands. — Background and Themes

Grid Logic and the Half-Mile Square

The guide's organizing principle is the half-mile square. Each of the twenty-three letters—A through Y, omitting X—names a vertical band, while the figures from 5 to 14 (and occasionally beyond) mark horizontal rows. A place like Adam Street appears multiple times: Adam Street, Adelphi is G 9; Adam Street, Manchester Square is E 8; Adam Street, Portman Square is D 8; Adam Street, Rotherhithe is M 10. The same street name recurs in different districts, each pinned to a different coordinate. The grid does not judge proximity or importance; it simply assigns a cell. This mechanical equality is the guide's core method: every location, from the Admiralty (G 9) to Notting Hill Grove (A 9), occupies one square in a uniform lattice.

Italic Markers and the Western Map

A note at the beginning states that lines printed in italic refer solely to the western portion of the map. Scanning the index, one finds clusters of italicized entries around Notting Hill: Addison Road, Notting Hill (A 9); Addison Road North, Notting Hill (A 9); Addison Terrace, Notting Hill (A 9); Norland Place, Notting Hill (A 9); Norland Square, Notting Hill (A 9); Norland Terrace, Notting Hill (A 9). The same pattern appears for Hammersmith, Albion Place, Hammersmith (A 11); Parbridge, Hammersmith (A 11). The italic type acts as a visual cue, alerting the user that these places belong to a separate, presumably more detailed western sheet. The guide thus acknowledges that a single map cannot show all of London at the same scale; the western districts required their own treatment.

Repetition and Variation in Street Names

Certain street names appear again and again, each time in a different part of the city. Paradise Row alone has six entries: Bethnal Green (M 6), Chelsea Hospital (D 12), Hackney (M 4), Islington (I 5), Rotherhithe (M 10), and a second in Islington (I 5). Park Street is even more prolific, with entries for Camberwell, Camden Town, Dorset Square, Greenwich, Grosvenor Square, Islington, Kennington Cross, Limehouse, Liverpool Road, New Borough, and Westminster. The index does not explain why so many places share a name; it simply records each occurrence as a separate line. This repetition reveals a city where names were reused freely across neighborhoods, and where a cab driver or pedestrian needed the full coordinate—not just the name—to reach the correct destination.

Cab Stands and Railway Termini as Navigational Anchors

The index is divided into three sections: Streets and Squares, Cab Stands, and Railway Termini. The cab stands and railway termini are not listed in the excerpt, but their presence as separate categories suggests that the guide was designed for practical, everyday travel—specifically for hiring a cab and knowing the fare. The map's half-mile squares would have allowed a passenger to estimate distance, and the index to cab stands would tell them where to find a vehicle. The railway termini, still relatively new in the mid-19th century, anchored long-distance travel. By including them as a distinct category, Mogg acknowledged that London's transport network was no longer just streets and squares; it was also a system of railheads that connected the city to the rest of the country.

Mogg's guide is best used as a reference tool, not a continuous read. To appreciate its design, pick a single street—say, Park Street—and trace its multiple occurrences across the grid. Notice how the same name shifts from square to square, and how the italic entries mark a separate western map. The guide rewards a patient, comparative eye: it is a document of London's geography as seen through the lens of a cab fare, where every location is reduced to a letter and a figure.

There’s something touching about Mogg’s careful grid of three thousand streets, a city neatly folded into half-mile squares. It makes me think of the old guides to cycling out of London, like Cycle Rides Round London — Text and Context, where the same patient curiosity reaches just a little further past the cab stands, toward the green edges of the map.