What did the banker do to kill the lawyer ?

What did the banker do to kill the lawyer ?

Ans. At three o’clock in the dark and chilly night, the banker took the key of the cell and approached the garden wing. Then he entered a narrow passage and struck a match. He peeped through the window into the cell of the lawyer. He removed the seals from the door and opened it. Then he entered the cell to kill the lawyer.