This is how an imposthume grows in a member when it comes from malice of complexion therein, or through excess that is sent to it from another member, stronger than itself; and it cannot expel or digest in itself: the excess remains in the member and forms an imposthume in the following manner; if sanguine humour 365 or any other humour is drawn to the member in such quantity that it fills the veins entirely, then the veins are stout and full, like a vessel, and some of it flows from the pores to the space in the member surrounding it, which it fills, and separates the parts, forming the swelling there that is called imposthume.