Alexander James Duffield (1821–1890) was an English mining engineer, Hispanist and writer.
He married and emigrated to South America, spending some years in Bolivia and Peru as a mining chemist, and learning Spanish.
He had plans, which proved unsuccessful, to introduce alpacas into Australia, several times visited Brisbane, and reported to the Queensland government on labour for the sugar plantations.
Subsequently, he travelled in Spain and other countries, and for some time held an appointment under the government of Canada.
[1] Duffield published:[1] Duffield also contributed a note on "The Lost Art of Hardening Copper" to Heinrich Schliemann's Ilios; the City and Country of the Trojans (Leipzig, 1880).