by Pickman » Jul 12th, '11, 17:52
At the end of John's description of the routine he has a note which mentions you could have the four discs in the corner of four different pockets instead of an index but Lady of Mystery is right, you could have four small indexes, each with five coins in four different pockets, this way you could get access to the right coin with very little fumbling (just as long as you don't mind the extra clutter in your pockets)