This fob watch, retrieved from the wreck of the Titanic, confirms the approximate time that the ship went down, 2:20 a.m. on April 15, 1912.

On June 7, 1692, an earthquake destroyed Port Royal, Jamaica. Centuries later, during a 1960 excavation in Kingston Bay, archaeologist Edwin Link discovered a pocket watch whose hands were frozen at 11:43 a.m., pinpointing the onset of the quake and confirming eyewitness accounts made 268 years earlier.

On Aug. 12, 1949, time slowed briefly in London: Fifty starlings settled on Big Ben’s minute hand and delayed the striking of the hour by four and a half minutes.

Oppressed by the sexual advances of her master, 22-year-old North Carolina slave Harriet Jacobs fled in 1835 and hid for seven years in a tiny loft under the roof of her grandmother’s house nearby:

The garret was only nine feet long and seven wide. The highest part was three feet high, and sloped down abruptly to the loose board floor. There was no admission for either light or air. … The air was stifling; the darkness total. A bed had been spread on the floor. I could sleep quite comfortably on one side; but the slope was so sudden that I could not turn on the other without hitting the roof. The rats and mice ran over my bed; but I was weary, and I slept such sleep as the wretched may, when a tempest has passed over them.

She cut a tiny peephole in the roof so that she could watch her children, who lived in the house but did not know of her presence. Eventually she escaped to the North, was reunited there with her brother and her children, and published an autobiography, Incidents in the Life of a Slave Girl, in 1861. “My body still suffers from the effects of that long imprisonment,” she wrote, “to say nothing of my soul.”

See Out of Sight.

Didius Julianus bought Rome. When Pertinax, the successor to Emperor Commodus, failed to support the Praetorian Guard in 193, they overthrew him and auctioned off the whole empire. Cassius Dio writes:

Didius Julianus, at once an insatiate money-getter and a wanton spendthrift, who was always eager for revolution and hence had been exiled by Commodus to his native city of Mediolanum, now, when he heard of the death of Pertinax, hastily made his way to the camp, and, standing at the gates of the enclosure, made bids to the soldiers for the rule over the Romans. Then ensued a most disgraceful business and one unworthy of Rome. For, just as if it had been in some market or auction-room, both the City and its entire empire were auctioned off. The sellers were the ones who had slain their emperor, and the would-be buyers were Sulpicianus and Julianus, who vied to outbid each other, one from the inside, the other from the outside. They gradually raised their bids up to twenty thousand sesterces per soldier. Some of the soldiers would carry word to Julianus, ‘Sulpicianus offers so much; how much more do you make it?’ And to Sulpicianus in turn, ‘Julianus promises so much; how much do you raise him?’ Sulpicianus would have won the day, being inside and being prefect of the city and also the first to name the figure twenty thousand, had not Julianus raised his bid no longer by a small amount but by five thousand at one time, both shouting it in a loud voice and also indicating the amount with his fingers. So the soldiers, captivated by this excessive bid and at the same time fearing that Sulpicianus might avenge Pertinax (an idea that Julianus put into their heads), received Julianus inside and declared him emperor.

He didn’t last long — Septimius Severus swept into the capital after nine weeks, and the Praetorians switched allegiance again. “And so it came about that Julianus was slain as he was reclining in the palace itself; his only words were, ‘But what evil have I done? Whom have I killed?’ He had lived sixty years, four months, and the same number of days, out of which he had reigned sixty-six days.”