Two things I thought about today:

1. When Pliny the Elder went on the naval boat to rescue the people in Pompeii, he was the only one on the ship who died. Why?
2. When nearby the Tiber, I think about how many bodies were thrown into the river after being murdered, only to show up a few days later decomposing, but also without any clues as to the murderer, really. The Tiber was not so well-fortified then, it had no measures against floods the way it does now. As a result, bodies washing up everywhere were, at times, quite common.