How the archaeology
got onto the map
Understanding how archaeology ended up on the map lets the map be read more intelligently. C. Fleet, correspondence, 2026
Five ways a find reached the sheet
Every antiquity on a Victorian Ordnance sheet arrived by some route — a surveyor's eye, a neighbour's word, a book on a shelf. The map's antiquity content is a mixture, not one testimony; each route carried its own kind of error, catalogued by F. J. Haverfield in 1906.
Direct field observation
A surveyor sees an extant earthwork and records it.
Named informants
A neighbour supplies the name; it is entered, with the informant, in the Object Name Book.
Printed sources
County histories, antiquarian maps (Hoare), society proceedings.
Special surveys
Dedicated Ordnance surveys of particular monuments.
The 1920 reform after the first edition
Crawford's Archaeology Division, aerial survey, systematic period review.
The lettering dated the find
The Survey lettered antiquities by period — the earliest in one blackletter hand, later ones in another, Roman remains in Egyptian capitals. Which face meant which period was fixed by the document in force when a sheet was engraved. That rule moved.
The same name, on the same face, three years apart, at opposite ends of time: under OS 404 (1881) “Old English” carries the earliest antiquities; under the 1884 field instructions it carries the latest. Read a c.1888 sheet by the wrong instrument and every date inverts — which is why a reading must key on the period-to-face mapping in force per sheet, never on the era's name for the face.
Cairnpapple Hill — who told the surveyor
For most Scottish names the Object Name Book records not just the name but its authority. Here is the whole chain for one antiquity, read end to end.
for spelling Revd J. Duns
Mr D. Thomson
Original: Object Name Book, OS1/34/55 — © Crown copyright, National Records of Scotland.
· Mr D. Thomson”
& Bronze Age cairn
The surveyors wrote down what they were told;
now we can read who told them.
The record partly descends from the map
“[The National Archaeological Record] may be directly traced back to the card index and map system developed in the late 1940s by Ordnance Survey for the depiction of antiquities on the nation's maps.”
— Hart & Leech 1989, p.57
Shared ancestry, not independent witnesses. When a first-edition label “agrees” with a modern record, part of that agreement is inherited — the record grew from the map. Absence is not a clean signal either.
WHAT WE DO ABOUT IT measure map reliability only against controls whose modern evidence is independent of the map — excavation, aerial transcription — reported separately from records that descend from the Survey.
What the notebooks actually say
Thirty-four antiquity entries were read across two counties' Object Name Books — West Lothian (Torphichen) and Orkney (Birsay, North Ronaldsay). Three results follow, none of them what the classification assumed.
Mr D. Thomson
New Statistical Account
Fullarton's Gazetteer
Forrest's County map
Entries were read from the transcribed volumes on ScotlandsPeople; no page images were taken, and one volume was read per parish. Of the twenty West Lothian map labels sampled, nine were too fragmentary to search — a measurement of the recognition pipeline rather than of the archive. The readings are machine-derived and have not been checked against the page images. Extending beyond this sounding requires a transcription-data agreement with National Records of Scotland.