Self-correction: what I say about the cut thumb still stands, but there were abrasions to the back of the right hand. I don't believe Bond would have mistaken abrasions ("scrapes") for cuts, so quite how she sustained that damage to the back of her hand is probably something we'll never know. I somehow doubt they would have been caused by a knife.
I think she might have awoken when the killer put the sheet over her face and had a brief moment or two to fight back and call out before she was incapacitated.
More than likely the cut to thumb and abrasians to back of hand were defensive IMHO.
slashes on arms were probably post mortem.
__________________ "Is all that we see or seem
but a dream within a dream?"
-Edgar Allan Poe
"...the man and the peaked cap he is said to have worn
quite tallies with the descriptions I got of him."
-Frederick G. Abberline