Missing Chest

As some of you may or may not be aware, I had a chest outside of Srtonghold Arthaka where I was accepting donations to improve the melon farm. The chest is no longer there. I have not been online recently so I do not know when exactly it disappeared the coordinates of this chest's (previous) location are x849 y65 z642. Any help will be appreciated.

I think what happened there was a creepergrief pig. Ive been the one improving the area surounding stronghold arthaka and when i first got there half of the melon farm was creeper bombed (it looked like) I would be happy to replace anything you need however, as I am working diligently to get the stronghold into a proper area for an actual town.

The list of items in the chest was very long, and I wouldn't want to burden one person with everything in it, but I will write it all out here.

Items in the chest were as follows (as far as I know all requested items were inside of it at one point):

3 stacks planks
1 stack redstone dust
10 repeaters
2 redstone torches
30 pistons
7 sticky pistons
1 stone pressure plate
7 melon seeds
3 water
3 stacks dirt

If anyone has any of these items, it would be much appreciated if you were to put at least some of them in the replacement chest.

30 pistons! o.0

I was the one who put them all in