"To accurately cut a block, score a line around it with a 3 1/2" brick chisel and a 3 lb. sledgehammer. Place the cutting edge of the chisel in the center of the score line and strike the chisel sharply with the sledgehammer."
Way to go Fred. I'm in the home stretch on my brick landscape wall and have cut quite a few bricks with the same method/tools you figured out. Trial and error will get you to the point where you look like a pro doing it.