4 versions

SOOC:


This one, I added a gradient layer and colorized it in a hue/ sat layer (and adjusted the hue and saturation), then adjusted levels and contrast:


This one, I removed the color, bumped up the contrast, then added a diffuse glow filter:


This one, I just removed the color and bumped up the contrast:


For some reason, there is more difference in the appearance of these last two images in PSE than is showing up on here, but nevertheless, these are the different methods I've tried to convert this to b&w.  CC welcome. :-)