I know this post may come across as a bit strange, I didn't know where else to post it, I live in a house with husband, baby and dog. Its a 1950's home and only had one occupant before us, an elderly lady who died in her 90's. Upon cleaning my house the other day I looked up and noticed what appears to be really light scratch marks on the living room ceiling... I asked husband (I knew he hadn't but asked) if he had messed or dusted and he said no. Obviously the dog can't reach or the baby. Even I'd have to stand on a chair to reach. They definitely weren't there last week. I know its probably nothing but it just seems like four finger lines as though it's been scratched see attached photo... I've tried to darken the photo so you can see it better.