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An Inventory of the Historical Monuments in the County of Northamptonshire
… by the River Nene. The subsoil is chiefly Northampton Sands to the N. and Upper Lias Clay to the S. with some … c, SP 807634), N. of Great Billing village, on Northampton Sands, at 91 m. above OD. Air photographs (Kemps 125, 126) … E. of Lings Wood at Blackthorn Thicket, on Northampton Sands, at 100 m. above OD. A double-ditched enclosure, …
An Inventory of the Historical Monuments in the County of Northamptonshire
… by the R. Nene. The subsoil is chiefly of Northampton Sands or Upper Lias Clay with some alluvium along the sides … ( c. SP 793629), S. of Billing Arbours, on Northampton Sands at 35 m. above OD, is said to appear on an aerial … N. of Billing Arbours, on Upper Lias Clay/Northampton Sands, at 83 m. above OD. 'Vague ditches' are reported on an …