I've lost my crowbar!

[robedits]

I need to break the window in the study to crawl out on the ledge, in order to get into the blocked room to find the 3rd and final crystal.
BUt I used the crowbar somewhere else in the study (I guess),though I don't remember doing so. Either way,the crowbar is NOT where it's supposed to be (according to numerous WTs) now,and I've tried many ways to break the window and cannot...without said crowbar.
I've looked high and low throughout all the detrious. Don't know where I might have dropped the crowbar,but it ain't in the stufy rooms or hallways!
Suggestions,anyone? Thanks.