Thomas Jones Howell (1793–1858), son of T. B. Howell and co-editor of Howell's State Trials
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Thomas Bayly Howell (1767–1815), English lawyer and writer who edited and lent his name to Howell's State Trials
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In 1537, Thomas Howell, a Welsh merchant trading in Bristol, London and Seville, bequeathed 12,000 gold ducats to the Drapers' Guild to provide dowries “every yere for Maydens for ever.” His “Merchant’s Mark” is still used as a logo for the school.