See, at first I was excited about getting to read another thing with Marsh, cause I absolutely love that character, but I feel like it fell flat in some places. It was mildly interesting, but not enough for me to upvote. Also, you've got some formatting slip-ups and I think I also spotted a typo in there, making it seem like the whole thing was kinda rushed. Still, I enjoyed it enough to not downvote it, so it's a +0 from me.
One specific thing I noticed is that in some places, there weren't enough descriptions of the characters' expressions, movements, surroundings etc. for the amount of dialogue that you presented. Many times I had to guess who's talking at the moment using context clues, and it made the entry feel a bit chaotic. Even stuff like "Marsh said, frowning" or whatever here and there would've helped.
Irish Coffee / Discussion
This is the discussion related to the wiki page Irish Coffee.