If the other portraits
by Stevens are not
quite equal to this they yet fall very little below it, and the portrait of «Mrs. Young Mitchell» (Tate Gallery), though left unfinished on
account of the death of the sitter, remains one of the
most charming and sensitive portraits of its age.
The
most reliable empirical evidence available fails to shows anything that can't be
accounted for
by quite ordinary, smooth changes of a quasi-gaussian stochastic process.