I can not quote a reference but I read Nobel like Oliver Winchester was haunted by the dead caused by mis use and in Winchester s case the Proper Use of their inventions All the ghosts of those killed in accidents handling nitroglycerin bothered Nobel so that he had consulted a medium She said he must donate his fortune to the good of mankind to find peace in the afterlife A similar story is told about Winchester s widow Sarah Winchester She was haunted by ghosts of Oliver s inventions consulted a medium and was told noise would keep the spirits quiet So she had her house in San Jose CA constantly added on too in hope the pounding would temporarily silence the vengeful spirits This Winchester Mystery House is open to the public Rooms and doors go nowhere etc One wonders if Krupps Maxim Gatling Browning DuPont etc had similar stories