Agreed! I'm especially impressed by the use of smaller and smaller stuffing in the wound, in order to force it to heal from the inside out, instead of the outside in.
Marcus does mention infection, and I think that may be a bit of modern knowledge slipping in there, because I didn't think that Romans were much aware of how "infection" worked. But the practice of not allowing a wound to heal from the outside in is sound.
The probe makes me squirm, however. Especially when you remember that this would have been done with no anesthetic.