Today in “the sentiment is a good one but under the circumstances the punctuation could potentially cause confusion”: just to clarify, the story in question does not, repeat, does not involve a romantic relationship between Sherlock Holmes and HP Lovecraft.
well not with THAT attitude it doesn’t
If you’re interested in reading the story Neil wrote, as opposed to the Rule 34 thing the subsequent comments imply, it’s called “A Study in Emerald,” and appears in a compilation of similar stories called “Shadows Over Baker Street”
Here it is on his website. I love this story, it totally roped me in, it deserved the Hugo. 10/10 would recommend.