Flatbed scanner. Unfortunately I didn’t notice that the (heavy paper) page was slightly larger than the scanner bed, so the lid didn’t close all the way and the paper wasn’t pressed against the glass. You can see a slight variation in the bottom left corner of the engrave, the result of an almost invisible gradient in the scanned image.
I have a better scan of it now, might do the same job again on better material. Maybe engrave it into some clear acrylic, make a window-hanging piece.
Oooooo, very nice! You might still be able to get some contrast out of it by staining the engraved background then spot sanding the unengraved portion. Or you could make a mask on your Glowforge for the unengraved bit, and spray the unmasked portion.