Even if this had been stripped of author name, I could've guessed that this was written by the author of the Copse. Like that one, this one was very evocative of the mood, but like that one, in the end I'm not really sure what happened. There was a hole in his opponent's face that opened into a vast void, I think...
The first half of the story I didn't have trouble grasping. But, the first half of the story bothered me in its use of perspective. I really want to sink into a story and feel like I'm the character. When this works, it's because the POV is done very well. One of the biggest obstacles to this kind of POV is the POV withholding important information from me. If I realize that the POV character is withholding vital information from me (for dramatic effect or whatever reason) then this creates a distance between me and the character that I'd rather do without. I don't feel like I am the character because if I were I would know what they know. I'm not talking about knowing their childhood history (unless that's actually important to understanding current events), but anything of vital interest right now should be disclosed. In this case what bothered me is not knowing the topic of the other man's thesis. In the first 20 minutes it is brought up again and again, and is clearly meant to be the focus of the story. They have arguments about it, it's what drives the plot but I don't know what it is. Then finally when it's revealed 20 minutes in nonchalantly, that's when I actually got some interest in the story. For it to work with the POV, it would've been better IMO for that information to be near the beginning. And it seemed like withholding that didn't even provide any useful dramatic tension, it just got on my nerves and made me feel more distant from it.
So, overall, I still like the use of mood for language, but between the distancing use of POV and lack of listening comprehension, I'm not sure I really got it.