Thank you. Let's see, I should preface this by saying that it is not unusual for me to read something and then, even years later, realize that it has sparked something in terms of a project or paper I am working on. So in answer to several of your questions, I have to say, I don't know. I used to have a large SF collection, but before it was dispersed, I looked at all of my story collections. Even now, when I travel, I go to libraries and search through SF collections. So, regarding cover, theme,title, author, size of volume, I don't know.
The story starts with the detective, in a one person spaceship, pursuing the kidnapper. There is reference to a large abyss or void, in which it is possible to get lost. Approaching the kidnapper's ship, he communicates with the kidnapper and views him (presumably through some viewscreen), sexually groping the "kidnappee," who is obviously cooperating with, and enjoying the kidnapper. The detective's ship is somehow thrown into the abyss. The Victorian elements are in the description and stance of the detective, who is portrayed as quite proper. (I remember it having a Sherlock Holmes kind of feeling.) I have no idea if volume was devoted to a postmodernist theme, but clearly,the story was composed by someone who was readily addressing fall of the grand narrative. The simulacra are described, I recall, as dancing holograms (I believe they were small, on a table/or surface in front of the detective. The end of the story - I believe - involves the detective watching the simulacra dance and fade - as their energy dissipates - in the inescapable abyss.
The reason that I search for this is that I would like to write a paper on the abyss in Nietzsche, Levinas, and science fiction - contrasting Norman Spinrad's "Riding the Torch," this story, and Budrys' "Rogue Moon" and "Who?"
Sorry that I can't answer many of your queries, but thank you.