This unlabelled drawing appears to be the base for publication plans MP/CHY0083 and MP/CHY0084, though it has a sequentially-later former archive number. It was probably made by or for the Ministry of Public Buildings and Works, but there is no credit on the sheet, so copyright is uncertain.
This is part of the Volume: PF/CHY Chysauster Ancient Village, Madron, Cornwall; within the Series: EHC01/022 English Heritage Plans and Measured Drawings; within the Collection: EHC01 English Heritage(EH):Archive
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Iron Age Enclosed Settlement