How “spontaneous combustion” became a Victorian explanation
In the 19th century, some writers and self-styled experts claimed that a person could ignite from within—perhaps through intense emotion or heavy drinking—and burn without an outside flame. The idea gave a frightening, poorly understood event a seemingly bodily cause. But alcohol in the body does not make someone spontaneously combustible, and rage cannot supply the heat needed to set a person alight.
Charles Dickens brought the theory to a wide readership in Bleak House. Its character Krook dies in a fire described as spontaneous combustion. The episode made the claim vivid, but a novel’s depiction is not evidence that a body can catch fire without an ignition source.
The wick effect: a slower, external fire
A more ordinary process can help explain some reports of bodies being extensively burned while nearby objects are less damaged. First, an external flame must ignite clothing or another material. As the body heats, fat can melt and seep into the fabric. The cloth then acts like a candle wick: it holds the fuel close to the flame and allows a slow, sustained burn.
This is called the wick effect. It does not mean a body ignites itself. Nor does it automatically explain every historical account: the conditions of individual fires can be difficult to establish after the fact. Its value is that it offers a physical process for a burn pattern that might otherwise seem inexplicable.
The distinction is the key to the story. A fire can consume much of a body without engulfing an entire room, but that striking result still begins with an outside ignition—not a burst of mystical heat from within.
