You need the Mirror Shield. First, have you got the water running to power the house near the castle, so it makes music? Tell me if you have not, I'm gonna assume you have. First, wait around the house with the music. (try not to get too close unless you got the stone mask) when a girl comes out, wait till she's out of sight (or just use the stone mask) and go inside the house. when you go downstairs a mummy will come. don't get close to it, play the song of healing. When you have, you will get a mask. Go to the Deku palace in the Swamp and get 5 magic beans. go back to Ikana and go to the well. go down and inside it. put on your new mask and talk to the mummy on your right. give him the beans. Do the rest yourself, they will give you hints of what they want. *can't remember the name of the mummys*