One interesting thing about looking at portraits of another century...there are things that don't make sense. For instance, looking at Sargent's drawing of this woman I can tell that she has an elaborate hat on. However, I could barely begin to tell you what is hair and what is hat. I cropped this picture close to the head for just that reason. Rarely does 21st century fashion make sense to me, I can't pretend I will ever understand this sort of thing.
And for the economy, I just have to say again how looking intensely at JSS's drawings I see a few small, precise lines that make great suggestions as to features and the like. Less is definitely more in the works that I have looked at. To give you an idea, this portrait, which is small, and is based on another's work, only took around 15 minutes from start to finish.