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Alfonso X (attributed)
From the Libro del Tesoro, trans. Henry Wadsworth Longfellow
The Poets and Poetry of Europe, ed. by H. W. L. (Philadelphia: Carey & Hart, 1845), 637-8. Frequently reprinted.
Snow 2007 "The Libro del tesoro, still claimed to be by Alfonso, finds eleven of its stanzas translated into English iambic pentameter with the following rhyme scheme: ABBAACCA."