A very fruitful day indeed! I got 99
Mining
,
Slayer
and
Fletching
today!!
Also 93 Hunter, and with that all skills 93+. I can't believe I'm saying this but I may actually max, lol.
On topic, there's a new goal for me, catching 1,000 sprites. I've caught 500 before, but Jagex decided to reset your count, so caught another 450 since the update. Will probably finish this tomorrow.
The chest is briefly mentioned on the wikia page, it is inside the pyramid, east of the pit, behind some wall crushers.
Original message details are unavailable.
There is another path before the pit that leads to a chest that contains 50gp. It's quite hard to reach and serves no real purpose so you should just avoid it and go straight for the pit.
After the quest, talk to the Goblin scribe on the north upper level in Dorgesh-Kaan, and tell him some nonsense about the cave goblin history, which he'll believe.
I am not sure how many charm slices he holds, actually. Have been looking to see if someone knows, if you find out, please tell me.
I do think it might be 255, yes, I have 66 stored myself.
The leprechaun holds 30 of each, not so bad.
If you have any other questions, let me know!
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On topic, I've upgraded my Yaktwee stick yesterday, and also did some Flash Powder Factory.