Mr.Pneumonia was not what you would call a chivalric old gentleman. A mite of a little woman with blood thinned by California zephyrs was hardly fair game for the red-fisted, short-breathed old duffer. But Johnsy he smote; and she lay, scarcely moving, on her painted iron bedstead, looking through the small Dutch window-panes at the blank side of the next brick house.
Is Dutch windowpanes refer to the glass of window that made in Netherlands?
Many thanks for your help.
"Mite" is a metaphor. It is literally a tiny bug related to spiders. It means the woman is small.
"Blood thinned" (or "thin-blooded") is a colloquial phrase which implies weakness. With the reference to pneumonia, I would assume the woman is frail or sickly.
"Dutch windows" are a kind of window. They are large (relative to the room they are part of), decorated, and usually not covered by curtains or blinds. Describing them as small probably indicates they are modest in size but still decorated in the typical fashion.
