The Case of Death and Honey by Neil Gaiman
The Case of Death and Honey is a short story by Neil Gaiman that features Sherlock Holmes. "Death is the greatest crime of all." A dying Mycroft challenges his brother Sherlock to find a cure to death, to occupy his mind. He decides bees may have the answer, but not in Britain.
Source: http://www.pages.drexel.edu/~ina22/200/The Case of Death and Honey.htm