Great Drain to South ... ΝΝ-9 1687, 1688 Section ΝΝ 254 ... 19 May 1939
Great Drain; Marble Block in East Wall ... ΝΝ-19 3619, 3620 ΝΝ 2217 A 1129 Section ΝΝ 611 Section ΝΝ 253 Section ΝΝ 252 Section ΝΝ 254 ... 25 Jun 1946
Notebook ... R. S. Young ... 3601 3793 ... 1946
Notebook ... R. S. Young ... 1601 1796 ... 1939