Read the following passage carefully and answer the questions that follow :
Once upon a time, there lived a man whose first wife had died and who was now married to a very haughty and mean woman. The second wife had two daughters who were exactly like her. By his first wife, the husband had one daughter, named Cinderella. She was very beautiful, sweet and good tempered
No sooner was the wedding over than the step mother began to show her bad temper. She couldn't bear step daughter's good qualities. She compelled the poor girl to do all the work of the household. It was she who washed the dishes and scrubbed the stairs, polished the floors and waited on the two ugly daughters. The two daughters slept on the soft feather beds in elegant rooms. Cinderella lay in an old room in the roof on an old straw mattress. Yet, the poor thing bore this ill treatment very patiently and did not complain to her father, who was completely under the influence of his wife.
Where did Cinderella sleep?