That night, when Scrooge came home, the knocker on his door became Marley's face. He went in and locked himself up. Then a bell began to ring, and every bell in the house rang after it, and something came up the stairs through the closed door. It was Marley, in his usual waistcoat and boots, and a long chain was fastened about his middle. The chain was made of cash boxes, keys, padlocks, ledgers and heavy purses of steel. "I wear the chain I forged in life," said the Ghost. "I made it link by link, and of my own free will I wore it. Do you know the weight of your own? It was as heavy as this seven Christmas Eves ago, and you have laboured on it since." "But you were always a good man of business, Jacob," said Scrooge, trembling. "Business!" cried the Ghost. "Mankind was my business. The common welfare was my business. I am here tonight to warn you. You will be haunted by three spirits."