Mixed ... H.Α. Thompson ... 2158 2347 ... 1938
South Limit of Exhedra. Great Drain. Exhedra in Fork of Great Drain; Digging Inside ... Ζ-12 2264, 2265 Ζ 1478 P 12250 Ζ 1479 P 12251 Section Ζ 309 Section Ζ 303 Section Ζ 304 ... 11 March 1938
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