Mark Harden's Artchive
The Artchive: Whistler: Nocturn in Black and Gold
Image of Whistler's painting, "Nocturn in Black and Gold: The Falling Rocket," with general information about the painting. Provides link to large image which can be made to adjust to the size of your screen.
CGFA
Carol Gerten Fine Arts: Whistler: Portrait of the Artist's Mother
This presentation from the CGFA and Carol Gerten-Jackson provides a nice, large image of Whistler's painting, "Portrait of the Artist's Mother: Arrangement in Gray and Black, No. 1." A great site for a picture of the famous painting.