Letter from Edward Hull, 14 Stanley Gardens, Notting Hill, London, to Robert Harrison, [Assistant] Secretary-Royal Society Enclosing a copy of the "Summary of British Official Reports on the Metric System"[enclosure not present], at the request of the late Mr J Hill Twigg, who authored it, and promoted the adoption of the metric system for weights and measures in the British Isles. 9 December 1908