The mouse is born from the soil (humus), hence its name (mus). It is a small animal. A mouse's liver gets larger at the time of the full moon, which is the only time mice make sounds; at other phases of the moon they are mute. Their smell annoys elephants. If a mouse drinks water it dies, because they are very moist by nature. They conceive by licking, not through copulation, and by the taste of salt they become pregnant.

The ashes of mice mixed with honey and oil will cure earache. The gall of mice tempered with wine will treat worms of the ear. Mice dropping with vinegar cures alopecia (a disease that causes hair loss). Mice droppings pounded with wine and taken in drink loosens the stomach. The skin of mice applied to the heels cures wounds there.