Answers are grounded in this paper and cite their sources.
(1984). Geological surveys, mineral discoveries, and British expansion, 1835–71. The Journal of Imperial and Commonwealth History: Vol. 12, No. 3, pp. 5-32.
No takes yet. Share an insight, caveat, or question.
Robert A. Stafford (1984) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: