Where did the fire probably start?

Now, back to the news. An early morning fire damaged the historic Geller House today. It destroyed the third floor of the building, but fire fighters saved the first and second floors. There were only a few elderly people living in the building at the time, and they were carried out to safety.
   The Geller House was built in 1718, and was used as a hotel for over 150 years. George Washington stayed here in 1782. The Geller family owned the building until the 1930’s. Then they sold it to the Mills family. Five years ago, it was made into a building for the elderly.
   Several fire departments were called to the scene. When we asked Fire Chief Andrew Barnes how the fire started, he answered that most likely a burning cigarette caused it. Chief Barnes promised to further examine the cause.