English: Merchant mark of Richard Whittington (c. 1354–1423), Lord Mayor of London, as visible in 19th century engraving by William Luson Thomas (1830–1900) of a painting circa 1590 by Reginald Elstrack, Welsh Portrait Collection at the National Library of Wales (see RichardWhittington 19thCEngraving After ReginaldElstrack 1590.xcf).
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