No public IJR answers mention Harriet Holroyd, Countess of Sheffield yet. As people ask about it and share their answers, they'll appear here.
Overview
Harriet Holroyd, Countess of Sheffield, styled as Lady Harriet Lascelles from 1820–5, was an English courtier who was Lady of the Bedchamber to Queen Adelaide, the consort of King William IV of the United Kingdom.