HCR diary 10.12.1820 Mrs Basil Montagu on Mrs Aders' indiscretions "She knows too that Mrs Aders has visited at Mr Meux's when a woman of infamous character was there, she has been known to cut a stranger in the presence of Carlisle!!"
Crabb Robinson's exclamation marks were probably aimed at Mrs Montagu's thinking it such a sin. Thomas Carlyle (DNB 1795-1881) was a friend of Mrs Montagu's, he referred to her as "the noble lady"