
Portrait of Lady Archibald Campbell in Court Dress dates from about 1882. 1
The Pennells imply that it was one of three portraits, with The Grey Lady: Portrait of Lady Archibald Campbell y241 and Arrangement in Black: La Dame au brodequin jaune - Portrait of Lady Archibald Campbell y242, painted in about 1882, and quotes a letter from the sitter in which she stated,
'His first idea was to paint me in court dress. The dress was black velvet, the train was silver satin with the Argyle arms embroidered in applique in their proper colours. He made a sketch of me in the dress. The fatigue of standing with the train was too great, and he abandoned the idea.' 2
Crucy thought Valerie Susan Meux (née Langdon) (1847-1910) introduced Whistler to Lady Archie and that eventually friends dissuaded her from sitting further. 3

Portrait of Lady Archibald Campbell in Court Dress, Whereabouts Unknown
Only one title has been suggested:
It appears to have been a full-length portrait of a woman in spectacular 'court dress', and as described by the sitter: 'The dress was black velvet, the train was silver satin with the Argyle arms embroidered in applique in their proper colours.' 5
The Argyll arms are as follows: Quarterly, first and fourth, a gyronny of eight, or and sable; second and third, argent, a galley, sable, sails furled, flag and pennants flying and oars in action, sable. The crest, a boar's head, fessewise erased, or; armed, argent; langued, gules: supports, two lions guardant, gules. A 'gyronny of eight' is a shield divided into eight gyrons by straight lines all crossing at the fess point.
Janey Sevilla Campbell (Lady Archibald Campbell) (ca 1846-d.1923) married Archibald, the second son of the eighth Duke in 1869. She was a beautiful and cultured woman and moved in fashionable circles. Her patronage was important in restoring Whistler's position in London after his bankruptcy. Portrait of Lady Archibald Campbell in Court Dress y240 was the first portrait of 'Lady Archie' (see The Grey Lady: Portrait of Lady Archibald Campbell y241 and Arrangement in Black: La Dame au brodequin jaune - Portrait of Lady Archibald Campbell y242.
She was a pioneer in encouraging the production of pastoral plays, and posed in male costume for Note in Green and Brown: Orlando at Coombe y317.
Lady Archie's sister-in-law, Gertrude Elizabeth Campbell (Lady Colin Campbell) (1857-1911), posed to Whistler several years later for another unlocated portrait, Harmony in White and Ivory: Portrait of Lady Colin Campbell y354.
Unknown. It was not completed.
Unknown.
Unknown.
Unknown.
It was neither completed nor exhibited.
1: YMSM 1980 [more] (cat. no. 240).
2: Pennell 1908 [more], vol. 1, pp. 305-06.
3: Crucy 1905 [more], at p. 43.
4: YMSM 1980 [more] (cat. no. 240).
5: Pennell 1908 [more], vol. 1, pp. 305-06.