Survey Title: Simplified Sketch Plan of Holwell Cavern
Surveyor(s): [Ellis, B.M.
Year: 1967
Standard: ng
Grade: ns
Scale: 1"=25ft
Size: 9"x6.5"
References: SMCC Jnl 4(3)16-17
Notes: Plan only
Additional Notes: Comparison with Long (1932 survey) and Bryant (1958) survey