Chusseau-Flaviens - Belgian Royal Family - "19" Series

The glass negatives at George Eastman Museum bear handwritten inscriptions along the edges.   Many of the inscriptions transcribed below include the words, "Cliche C.Chusseau-Flaviens".   Exactly matching Chusseau Flaviens' #19F is an online record from Library of Congress' Harris-Ewing Collection describing as an "original" negative an image copied most likely from a Chusseau-Flaviens print.