Hi, We've recently bought our first house which is about 40's era. When taking the chipwood wallpaper off the 3rd bedroom ceiling we've noticed a fairly long crack in the middle of the ceiling with a couple of extra hairline cracks. The corner is also a cause of concern as when pressed there is slight movement. However, I think it has been there for some time so I don't think it's falling down any time soon! It's made up of lath and plaster so I'm wondering what the best advice would be for fixing it? I have seen others drilling holes around the area and filling both with compound? Thanks!