Seals of <a href="https://en.wikipedia.org/wiki/Richard_de_Beauchamp,_13th_Earl_of_Warwick" class="extiw" title="wikipedia:Richard de Beauchamp, 13th Earl of Warwick">Sir Richard de Beauchamp</a> and <a href="https://en.wikipedia.org/wiki/Thomas_de_Beauchamp,_11th_Earl_of_Warwick" class="extiw" title="wikipedia:Thomas de Beauchamp, 11th Earl of Warwick">Sir Thomas de Beauchamp</a> from "English Heraldry" (1867)
Charles Boutell (1812-1877)/R. B. Utting
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