Black Lion Warf, James McNeill Whistler, etching, roughly 6 x 9 inches (15 x 22 cm); link is to the impression in the collection the National Gallery of Art, DC. Their site has both a zoomable and high resolution downloadable version of the image, as does Wikimedia Commons.
I’ve had the pleasure of seeing in person another impression of this etching from the collection of the Philadelphia Museum of Art. I’ve taken the liberty of adjusting this image a little lighter to be in keeping with the impression I saw.
Whistler’s etchings of the wharves and warehouses along London’s River Thames just knock me out — so detailed in places, elegantly simplified in others, precise and yet loose and gestural.
The delicacy of line is a characteristic of etching that no other medium can duplicate, and Whistler was a master at it. When looking at the details from the image (like the figures on the balcony in the images above, bottom), keep in mind the size of the original.