[dainbramaged]

Joshua Slocum wrote about the Yahgan Indians of Tierra del Fuego in his book "Sailing Alone Around the World" (1900). He was warned they were dangerous so he sprinkled tacks on the deck of his sloop as a burglar alarm. It worked.
He also learned not to eat green plums and cheese at the same setting.

[SunkenCiv]

I’m not sure I’d eat green plums alone, either.

https://www.livestrong.com/article/549722-will-green-plums-hurt-your-stomach/