I am trying to identify an English language short story about Holmes, spending a year or more in a remote Himalayan rural setting. I think I first read it in the 2010s. I vaguely recall he persuades a pastoralist to assist him as he researches and keeps special bees. I think the honey produced by these bees may have contributed to longevity, or perhaps Sherlock Holmes was researching whether that was possible.
Sherlock may have been traveling under another name in the story (perhaps a Norwegian named 'Sigerson'?), and his identity as Holmes may only have been given away by clues to those familiar with Conan Doyle's work (I am unsure about this).
I had thought it was written by Neil Gaiman, but a peruse of short story titles from collections I have read, is not bringing the story to my attention.
What was this story?