"In this bold drawing, characteristic
of Sargent's hand, the differentiation of texture and tone has been accomplished
by varying both the pressure and the direction of the strokes. Sargent
has used the same pencil throughout the composition. The area of white
chalk on the back of the sofa was probably used to eliminate unwanted lines."
Birnbaum, Martin, John Singer Sargent, William E. Rudge's Sons, NY, 1941, p. 65, repr.
Meder, Joseph, The Mastery of Drawing, Abaris Books, 1978, pl. 266
Ratcliff, Carter, John Singer Sargent, Abbeville Press, 1982, p. 82, fig. 113
Fairbrother, Trevor, Sargent Portrait Drawings, Dover Publications, 1983, cat. 4