The map has 22 rows (A to V) and 33 columns (1 to 33) and is divided into six parts (click section under 1859 Map at left). 

  • Part A (Rows A-L, Columns 1-12)

  • Part B (Rows A-L, Columns 13-24)

  • Part C (Rows A-L, Columns 25-33)

  • Part D (Rows M-V, Columns 1-12)

  • Part E (Rows M-V, Columns 13-24)

  • Part F (Rows M-V, Columns 25-33)

There are two indices for the map, one presenting historical sites and reference areas relevant to Dr. John Snow (click at left on John Snow index) and the other showing historical sites for London (click at left on London index). Also presented are links to Greenwood's Map of London, 1827 (click at left on London Streets - 1827), to Charles Booth's 1889 Descriptive Map of London Poverty (click at left on London Streets - 1889), and to the current UK Street Map (click at left on London Streets - Current).


This geographic information system (GIS) is a broadband site requiring  fast internet connections. The graphics and programming for the GIS were done by Ralph R. Frerichs, using Adobe Photoshop 6.0 and Microsoft Front Page 2000. The GIS has 712 cells (711 quarter-mile squares and 1 title square) which serve as links for additional historical information.  The map continues to evolve over time with new locations and descriptions at the cell level, to be named when completed in the John Snow index and the London index.