JSTOR Ref
Edmund Craster The Letters of John of Salisbury. Volume One. The Early Letters (1153-1161), by W. J. Millor, H. E. Butler, C. N. L. Brooke, V. H. Galbraith, R. A. B. Mynors 25.1 (1956), 41-43 DOI:10.2307/43626609
JSTOR