Harry and Sirius were both laughing; Mundungus, who had toppled backwards off his chair, was swearing as he got to his feet; Crookshanks had given an angry hiss and shot off under the dresser, from whence his large yellow eyes glowed in the darkness.
Harry Potter and the Order of the Phoenix
I think "whence his large yellow eyes glowed in the darkness" is just fine. Why should we need 'from' here? Any thoughts?