Part 5
When the fistula does not get eaten through, having first examined
it with a sound, cut down as far as it passes, and sprinkle with the
flos aeris, and let it remain for five days. Then pour warm water
upon it, and above lay flour mixed with water, and bind on it the
leaves of beet. When the flos aeris comes away, and the fistulous
sore becomes clean, cure it as before described. But if the fistula
be in a part which does not admit of this treatment, and if it be
deep, syringe it with the flowers of copper, and myrrh, and natron,
diluted with urine, and introduce a piece of lead into the orifice
of the fistula so that it may not close. Syringe the fistula by means
of a quill attached to a bladder, so that the injection may distend
the fistula. But it does not heal unless it be cut open.