First beautiful game that I absolutely love...got it last week on Steam and already have 40+ hours in!

Sorry, issue resolved! =D
*spoilers follow*
...and I have searched in vain for it on the ground at the bottom of the staircase that the guide indicates. Am I missing something (i.e. I have to knock it out of the tree, or some such?). All the components for "The Sleep of Thieves" quest seem to spawn independent of quest activation or the like (found the beetle eggs and crimson 'shrooms before I even knew the quest was a thing)...Anyway, here is what I am running:
Playing with an XboxOne wireless on a CoreI7-6800 @3.4GHz with Windows 10x64 and 64GB RAM
Thanks for any help and no matter what, I simply can't wait for the game's full release...I have not had this much fun playing a game since I played "Sid Meier's Pirates" and "Warcraft 3"!