From: "A Numerous and Fashionable Audience: The Story of Elsie Swinton,"  
by David Greer 
Posted: Wed, 30 Oct 2002 

'Elsie Swinton (1874-1966), nee Ebsworth, was a prominent society lady in Edwardian England, who in 1906 took the unusual step (for a person of her social rank in those days) of becoming a professional singer, and in the years up to the First World War she had a successful career despite family opposition. She was also of striking appearance, and there are portraits of her by Sargent, Sickert and others. In her singing career she worked with well-known musicians such as Hamilton Harty, Percy Grainger and (who was one of her many admirers). She also kept open house to many, including Stravinsky, Prokofiev, Szymanowski and Arthur Rubinstein. After the war, opposition from the family and other factors led her to abandon her career and she turned to good works and exploration of arcane philosophies.  

Although British, she actually grew up in St Petersburg, and left vivid accounts of life in pre-Revolution Russia.  

This book is based on unpublished memoirs by Elsie and other members of the family. It includes an appendix of hitherto unknown lettersto her from
--author 

The books author:- DAVID GREER  
Department of Music  
University of Durham  
Palace Green  
Durham DH1 3RL  
GB-England  
 

The sisters are Lady Elcho, Mrs. Adeane, and Mrs. Tennant, all daughter of the Honorable Percy Wyndham. The painting was done in their London home on Belgrave Square. Sargent has arranged the women so that their mother, Madeline, is looking down upon them from the full portrait by George Frederick Watt.
 

If I'm guessing their ages correctly, Lady Elcho, would be the one on our left, she is Mary Constance neè Wyndham (1862-1937) -- the oldest. She married Hugo Richard Wemyss Charteris Douglas, Lord Echo in 1883. Her brother-in-law was the Honourable Evan Charteris who did that first biography of Sargent shortly after John's death. Mary would have been roughly thirty-seven at the time of sitting.

Mrs Adeane, would be the one standing, she was Madeline neè Wyndham (1869-1941) and she married Charles R.W. Adean in 1889. He was the Lord Lieutenant of Cambridgeshire. Madeline would have been about thirty.

Mrs. Tennant, sitting on the right and obviously the youngest, was Pamela neè Wyndham (1871-1928). She married Edward Tennant in 1895 and she became Lady Glenconner when her husband took title in 1911. When her husband died in 1920, she married Viscount Grey of Fallodon in 1922. Pamela would have been about twenty-eight at the time of sitting.

(John Singer Sargent, Portraits of the 1890's; Richard Ormond and Elaine Kilmurray; Yale University Press; 2002; pp 155-159)
 

Sargent would later draw a sketch "mugs" of of some of their children.
 

 
Rose-Marie Ormond  
(later Madame Robert André-Michel) 
Date?