In late 1892 Sargent began work on the portrait of Lady Agnew, commissioned by Andrew Noel Agnew, a barrister who had inherited the baronetcy and estates of Lochnaw in Galloway.
The sitter was to be of his young wife, Gertrude Vernon (1865-1932).
Lady Agnew - John Singer Sargent
The critics loved it when it was exhibited at the Royal Academy in 1898 and subsequent exhibitions:
A masterpiece... not only a triumph of technique but the finest example of portraiture in the literal sense of the word, that has been seen here in a long while. (The Times, 1893)

jenray
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That has to be one his best portraits...I've seen this one and it's beautiful...she is stunningly beautiful...
GBHs...XXX