Preferred your 10 word scenario.
Can't remember it. I suspect there may have been more than one incident. Some kind of flare up and then a lull, which left an uneasy atmosphere, but a relief the initial incident had subsided. At this point, outside assistance wasn't requested. I think Nevill dozed off downstairs on his chair, perhaps after a nightcap. Sheila remained awake in her room, brooding over her interpretation of events. Delusional, determined and furious, she waited until it seemed everyone was asleep and crept past an exhausted Nevill to retrieve the rifle that she, but nobody else had spotted earlier.