Despite a lot of research time, I was not able to identify the artist's signature on this postcard. My frustration is mollified because this is one of those cards about which I can say: I've never seen another one like it! There is a plethora of Paris photos and watercolor postcards of the booksellers along the river by Notre Dame. This one stands out. Mailed from Lyon on March 11, 1912, this card is typical antique size: about 5.5 by 3.5 inches. It is in mint condition.