the flash of lightning behind the mountain

I was checking out Wormwood Review (Issue 144) and found this poem. Because this Issue is from 1996, I came (here) to look for more information, but found none. Apparently it was only published in Wormwood. I'd like to know If anyone knows more info about this poem (when was written etc etc...

Someone wasn't paying attention and put a changed version of a posthumously published poem into another posthumous book eight years later. Caught with your finger in the pie, butcher. "hang the wallpaper," eh?

Because it's short. I don't have a good enough dictionary to sort out words like "hypocodont" or "caseic" or their replacements. A lot of the humour (okay, humor!) is lost in the Flash of Lightning version. From New York Quarterly #49: prescience I was always charmed and ensnared by...