But as far as the progression of his work over time, the curator's note Lukas mentioned on the back of the print makes no sense to me in the context of the reproductions I've seen. That print in red, showing the woman to have a full head of hair and giving a very nice gradation in the filmy cloud of gauze around her shoulders, is given a date of 1898 in Camera Notes; another print of apparently the same subject with the same hairdo but a different pose, that has the highlights so blown out that it looks like she has a big bald patch on the side of her head, is given the date of 1900. (And it looks that way in a variety of different reproductions, so it's not just one particular reproduction that didn't reflect the print accurately). So I'm not sure that his work could be seen as a progression in the direction of printing a full photographic tonal scale.