The passage describes an extraordinary account of a man whose bodily excretion was notably clean and odorless, resembling the shape of round balls. The physician, impressed by this, detailed the experience in a letter, highlighting the lack of mess and smell, which was akin to that of a freshly baked biscuit. This remarkable cleanliness led the doctor to consider it a model for others to emulate.

In a footnote, the author references that similar specimens of this man's excreta were preserved for five years without alteration. This peculiar anecdote contributes to the exploration of human digestion and excretion presented in Mary Roach's book, revealing a unique perspective on a typically unspoken aspect of biology.