- en.m.wikipedia.org File:Thomas Allan (1777–1833) painted by JW Gordon.jpgEnglish: Portrait of the Scottish mineralogist and banker Thomas Allan (1777–1833) by the Scottish portrait painter John Watson Gordon (1788–1864).
- steigrad.com gordon-portrait-of-thomas-allen-with…< > SIR JOHN WATSON GORDON (Edinburgh 1788 – Edinburgh 1864).
- wikidata.org wiki/Q124850761Thomas Allan (1777–1833) painted by JW Gordon.jpg 662 × 800; 53 KB.
- myartprints.co.uk a/gordon-sir-john-watson/…
- meisterdrucke.uk artist/John-Watson-Gordon.html
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