[–] Jimmycog ago 

No bullet, no reason for an operation, the bullet killed him.

[–] SmokeyMeadow ago 

This is likely why Teddy Roosevelt didn't allow doctors to remove his bullet, after he was shot by a would-be assassin. He knew medical technology of his day was a joke. As the story goes, he kept right on and gave the speech he was scheduled to make. Apparently the thick notes of that speech may have slowed the bullet enough to make it non-lethal.

[–] RoundWheel ago  (edited ago)

Lincoln was killed by his doctors as they probed his brain with fingers and scrambled it long medical instruments.