But so far even the entries for those violent days of September, 1846, had given him no clues.
The bombing was part of a violent day across Iraq in which at least 52 people were killed, including an American soldier.
People who survived Saturday's pounding winds called it the most violent day of weather in memory.
"Silver had one of the most violent days any commodity market ever had," he said.
We've never had a big dog before, but we thought in these violent days it might protect us.
At least 136 people were killed in the most violent and bloody day since the uprising started.
Today was the largest demonstration and the most violent day in a campaign that has gathered strength over the last two weeks.
The bombing capped a violent day here and in other parts of Iraq.
They argue that history has continued at Gettysburg since those three violent days in 1863.
But by the standards of the last week, today was not a violent day.