This is the Elizabethan version of Blind Man's Bluff. The person who is "it" has their eyes covered, either by a blindfold or by a sack. This person attempts to grab one of the other players as they smack and poke at him/her. When someone is caught, "it" must guess who was caught. If the guess is correct, the players change places and the game continues with a new "it".
Simple, huh?