Notes that at the 'Shandon Sale... on Friday May 18th 1877' [the sale of the goods of Robert Napier of West Shandon], Lot 2298 was 'a chronometer in silver case, by J. Harrison, 1770, being the duplicate of one for which the inventor received a rewards of £20,000 from the Board of Longitude...'; record of Harrison's chronometers in the 'Catalogue of Naval Exhib[itio]n 1891 page 380'; detailed quoted description of 'No 3. Instrument bought by Clockmakers Co. The duplicate of No. 1. Made actually by Harrison'.
Rough calculations on verso of final sheet.
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