On the first of April, the New Zealand Film Archive - now part of Nga Taonga Sound & Vision - celebrates 40 years of saving and restoring the nation's screen history, from feature films to home videos. The late Jonathan Dennis was a leading light in setting up the archive in 1981, at a time when a huge chunk of our early film material had been destroyed or lost. It was a race against time then, as it is now, to save early nitrate films that are have been in peoples' homes for years, not always in perfect storage conditions. Lynn Freeman speaks to film enthusiast and long time staff member Sarah Davy about the Archive's plans for the anniversary and also about its own history.