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LIST OF ILLUSTRATIONS.
| TO FACE PAGE | |
| View of Telford’s Bridge at Gloucester | 1 |
| „„The Severn (Railway) Bridge | 2 |
| „„Sudbrook Chapel | 4 |
| Map (1-inch Ordnance) showing Line of the Severn Tunnel | 10 |
| Plan of Sudbrook in 1873 (before the Severn Tunnel was commenced) | 14 |
| Plan showing Position of the Old Shaft, Iron Shaft, and Headings | 16 |
| Section showing all Headings driven when the ‘Big Spring’ broke in | 18 |
| Plan of Sudbrook in 1879 | 18 |
| Plan of Shield put in the Old Shaft to keep back the ‘Big Spring’ | 28 |
| Longitudinal Section of the Severn Tunnel, showing Geological Strata as found | 32 |
| Cross Section of Tunnel, showing Arch | 34 |
| Plan of Sudbrook in 1880 | 38 |
| Plan of Headwalls and Doors in the Heading at Sudbrook | 54 |
