1130. Moreover, there are also others who act within the head, and indeed about the internal region of the left ear, in an almost similar manner, though not with so manifest a force of suction; they were also so acting [upon me] for some time. It was said that they are those who in almost the same way attract the spirituous chyle from the cerebrum and lead it towards the heart, in order that it may be conjoined with the chyle of the body. Thus they constitute that which the jugular veins [carry], these veins also having an attractive force. For it is well known that the jugular vein descends to the region where the chyle of the body rises up through the thoracic duct, and this to the end that the spirit of the brain and the chyle of the body may be copulated for the preparation of the blood. Those who were acting within were they who constitute that province or region where the jugular vein is above the thoracic duct, and also those who constitute the upper part of the duct into which latter some ducts containing lymph are also inserted.