In Frankenstein, Chapter 15
I cherished hope, it is true, but it vanished when I beheld my person reflected in water or my shadow in the moonshine, even as that frail image and that inconstant shade.
Monster's hope vanished when it saw its horrible image.
But what does ", even as that frail image and that inconstant shade." indicate here?
Does the "even as" and "that" in this sentence serve for?