Blake, N. The Cambridge History of the English Language Vol II. 1992.

A Devonshire dialogue: https://archive.org/details/adialogue...

Another bit of Devonshire dialect: https://archive.org/details/jimandnel...

The paper on the County Durham court transcripts: https://www.jstor.org/stable/43345931...

The 1920s source on 'thee' in quaker speech: https://www.jstor.org/stable/452096#m...


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