Go to Millfields. Go below the graveyard and find the graves that are marked "Walter Coen, Stabbed in broad daylight", "Jeffrey Coen, Burned at sunrise", and "Theodore Coen, Shot in the dead of night". Notice that there are statues that hold spyglasses around Millfields. Exit the grave area and find the statue standing ahead of you that reads "Theodore Coen". Keep shooting that statue at midnight. It will glow momentarily, and you should hear someone dying. Go to the gazebo in the middle of the lake. Look down the bridge that leads to it to find the Jeffrey Coen statue. Equip the fire spell and casting it on the statue in the morning. It will glow momentarily and you should hear someone dying. Next, go to the Demon Door to find the statue of Walter Coen. Keep hitting it with your sword at noon. It will glow momentarily and you should hear someone dying. You will be prompted do perform an action. Do so, and the "East Hare Egg" will appear in the gazebo.