Feet have a lot of the same coloring characteristics as hands, with the toes being more of a reddish hue like the fingers, and the cooler colors on the top of the foot similar to the back of the hand. 

Another John Singer Sargent copy this time of a woman, Lady Helen Vincent. A Viscountess. I'm not sure what she was a Viscountess of or anything about her in general. Another three hour copy and this is hour one.