Another Wandlebury Enigma dismissed by Glyn Daniel that was featured in a 1978 " Sunday Telegraph " article is the " Line A Loxodrome " or " Cam Valley Loxodrome ", a series of what retired geologist Christian O'Brien considered to be hand-carved stone monolith markers placed 1, 430 metres apart between Wandlebury Earthworks and Portingbury Hills Mound at Hatfield Broad Oak, in Hatfield Forest.
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Another Wandlebury Enigma dismissed by Glyn Daniel that was featured in a 1978 " Sunday Telegraph " article is the " Line A Loxodrome " or " Cam Valley Loxodrome ", a series of what retired geologist Christian O'Brien considered to be hand-carved stone monolith markers placed 1, 430 metres apart between Wandlebury Earthworks and Portingbury Hills Mound at Hatfield Broad Oak, in Hatfield Forest.
