Lady Mary Stuart accomplished amateur artist and pastelist (1740–1824) (1740–1824) Parents Mary Stuart, Countess of Bute John Stuart, 3rd Earl of Bute Children Siblings James Stuart-Wortley-Mackenzie Frederick Stuart Louisa Stuart Jane Stuart Lady Caroline Stuart Lady Augusta Corbett Charles Stuart Anne Stuart William Stuart John Stuart, 1st Marquess of Bute Partners James Lowther, 1st Earl of Lonsdale