The Ballad of Timmy Mallon   Timmy was slow at school, Couldn’t count from one to two (When it came to mathematics, He hadn’t got a clue);   And so one day the master Took him by the hand And explained mathematics In a way he’d understand—   “Look here, Tim,” the master said, “I’ll show you how to count. Pretend that you have money And tell me the amount   In your trousers pockets— In one pocket you’ve a pound And in the other pocket There’s another pound;   A pound, Tim, in each pocket— Can you tell me…