[nephihaha]

"centuries of plowing"

Interesting that the American spelling is being used here. The author appears to be from the UK.

[ljf]

Correct spelling here in the UK version I'm reading - Quote: Because centuries of ploughing destroyed the original floor and hearths, its true purpose remains a mystery

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I wonder if they localised the spelling for audiences outside of the UK or if it was one of the many Gruniad spelling mistakes?

[nephihaha]

For what it's worth, I accessed the article from the UK.