Alpaca. (Camelus Pacos,) also Paco. […] This animal, like the camel, is domable, and will carry from seven to nine stone; it will fall on its knees for the convenient reception and exoneration of its burthen.
1815, Antonio de Alcedo, “Provincial Terms, &c.”, in G[eorge] A[lexander] Thompson, editor, The Geographical and Historical Dictionary of America and the West Indies. Containing and Entire Translation of the Spanish Work of Colonel Don Antonio de Alcedo, […] In Five Volumes, volume V, London: Printed for the author, and published by Carpenter and Son, Old Bond-Street; [et al.], page 8