Pieces of Ancient Popular Poetry.
London: Clarke, 1791; 2nd ed. 1833: 103-8.
The Latin Poems Commonly Attributed to Walter Mapes.
o.s. 16 (1841): 359.
Fitzgibbon, Henry Macaulay.
Early English and Scottish Poetry.
London, New York, and Melbourne: White, 1888: 13-14.
Robbins, Rossell Hope,
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2nd ed. Oxford: Clarendon, 1955: 51-5.