I have two things to ask: 1. Please can someone tell me how to find..

Octo Chart
Location: Six-Eye Reef
Use: Shows all of the Big Octo locations.

Great Fairy
Location: Two-Eye Reef
Upgrade: Double Magic
Look for a flock of seagulls and sail over to them. A Big Octo will appear. Though you can use the arrows if you wish, it is preferred to use the boomerang. Either way you choose, strike all of the eyes on the Big Octo until it is defeated. A Great Fairy will appear automatically.

Great Fairy Chart
Location: Five-Eye Reef
Use: Shows all of the Great Fairy locations.
Destroy all of the cannon ships and all of the cannons in the reef in order to make the treasure chest appear.

Ghost Ship Chart
Location: Diamond Steppe Island
Use: Shows the Ghost Ship's location depending on the moon phase.
Sail to Diamond Steppe Island. As you are approaching the island - note the trees on the island. You cannot walk onto this island.

Instead - you must use your hookshot to latch onto the lowest tree and get on the island. Then look for a tree stump and stand on it. Use the hookshot to latch onto the next tree. Then jump across the stream of water. A blue chuchu will appear so use the grappling hook to steal a blue chu jelly drop from it.

You can just kill it normally - but there is a small chance that you won�t get the jelly. Moving on - latch onto the last tree to make it to the top. Enter the hole to begin a small dungeon. When you arrive in the mini dungeon - climb into the pot directly in front of you.

When you land - bomb and then enter the pot that is almost in front of you. After landing - make your way past the two floor masters and bomb the rightmost pot and enter it.

When you have landed - look to the right and you should see two pots. Head to the leftmost one - then bomb it and enter it. The treasure chest is behind some wooden railing - but you should be able to see it fairly easily.