(Redirigé depuis LHEB)
- Jackson, Kenneth Hurlstone. 1953. Language and history in early Britain: A chronological survey of the Brittonic languages, first to twelfth century A.D., Edinburgh: University of Edinburgh Press.
- acronyme LHEB
Fleuriot & Fleuriot (1977:15): "Ernault's work was fundamental for the study of Middle Breton. We had to wait, however, until the middle of the twentieth century for the great works of synthesis. As was the case for other Brittonic languages, Jackson's book Language and History in Early Britain was a milestone. Here was achieved the first general book on the history of Brittonic languages, and its main conclusions seem so sound and well established that the book remains the basis for all further studies."