The Tate Collection's notes for this portrait include this biographical information, "The present picture of Mrs Beckford, and that of her husband, was probably commissioned from Reynolds as a marriage portrait. Susannah Beckford (d.1803) was by then a very wealthy woman, the sole heir to the fortune amassed by her father, Richard Love of Basing Park, Hampshire. In February 1755 she married Francis Beckford (d. 1768), one of nine legitimate children of Peter Beckford, Governor of Jamaica, who had accumulated vast wealth from sugar and the slave trade. It was Francis Beckford's second marriage, his first wife having died in February 1754. According to the London Magazine for 1755 Susannah's personal wealth at the time of her marriage was £20,000."
From pinterest.com/lucindabrant/18th-century-artladies: image temperature decreased and tint increased by gogm using other versions of this image for guidance.