I’ve found (luckily, without having to die first) a tentative answer to theMaryCeleste mystery. The ship was carrying a cargo of barrels of alcohol; if some ofthose were leaking, the fumes could have made the crew think the ship was indanger of exploding. So everyone headed for the lifeboat, tying it to the ship sothey could get back on board if and when it was safe—except the rope cameuntied, and they drifted off
This was particularly interesting, as I have read about the Celeste mystery and always wondered what happened myself. This sounds very probable for what happened, but unlike the stories we read, there is no resolution tied up with a neat bow.