Hygiene standards were low in the Medieval World, leading to endemic dysentery and a consequent chronic paper shortage. Scribes took the sensible decision to pass on their knowledge in the spaces alongside the script of a popular self-help book of the day, The Holy Bible. The superstitious psycho-babble of this frankly bizarre publication now seems as incomprehensible as it is dated, but the wisdom of the Medieval Marginalia often hidden in its darkest corners speaks to us down the ages.
A screenshot from Age of Umpires II: Age of Cricket. In this example, we see the classic "Shotgun-Seven" formation being used to maximum effect. Any good Umpire would note that this places a good deal of emphasis on the left side, making it easy enough to sneak in the stray foul wicket.