Okay listen I'm not saying the lines were old back than. Nor am I saying that they started the fire. What I am saying is that the lines were made of different material than they are made of today, I am sure. Secondly, my suggestion is that because it was a rainy night, there could have been lightening which struck the line, (where it was supposedly cut). Because of the material they used back than, could it be possible for the line to have sparked if the lightening hit it directly, and sent the spark all the way down the line, and to the house where it was connected for the phone.