The Case of Lady Chatterley's Voodoo Dolls

In this 10,000 word story Sherlock Holmes and Dr Watson investigate a theft and find a threat to the British Empire and Her Majesty Queen Victoria.
They travel by horseless carriage from Winchester to the New Forest and beyond, with Dr Watson at the helm.
In the course of this adventure they piece together the links between a Christian missionary, an exotic bird, an African Witchdoctor, Lady Violet Chatterley, an evil Lascar, a pair of Voodoo Dolls, and danger to the person of Her Majesty.
With determination, logic, and scientific knowledge they follow the trail to thwart a shocking disaster.