We have lift-off. However, I get many fewer results than you.
Navigate, in Finder, to your boot volume's /System folder. In the Finder window toolbar, type wish into the search box.
Click "System" instead, to change the location of the search to /System. (At this point, my search yields 157 results, almost entirely C Header Source Files.)
For me, that search method got these:
jawt.h Plain Text
wish.htm HTML Document
Wish Application
Wish Application
The two Wish Applications had quite different icons. One was a blue feather and the other was a blue feather on a red background with the letters tcltk. Get Info said the blue feather was 8.5.7 and the blue feather/red background was 8.4.19
To replicate this revised search in Terminal, paste the following command:
mdfind -onlyin /System "kMDItemDisplayName == *Wish*"
This search generated:
/System/Library/Frameworks/Tk.framework/Versions/8.4/Resources/Wish.app
/System/Library/Frameworks/Tk.framework/Versions/8.5/Resources/Wish.app
Thanks for taking the time to lay out these sets of instructions. It's been most interesting and educational.
ryck