I had heard him say he would stab me if I attempted to strike him; I saw blood on my hand, and on his nose - I cannot swear whether there was any blood on his face before my hand was cut, I was so flurried; I do not know whether I struck him or not before my finger was cut - I might have struck him in the face after he threw the first knife at me - I will not swear that I did not strike him severa