Welcome to Sherlock Holmes short stories.

I'm Hugh Bonneville and this is The Adventure of the Bruce Partington Plans Part 2.

Last time, Sherlock Holmes received an unexpected visit from his brother, Mycroft,

the hidden power at the heart of the British government whose mind contains all its secrets.

A young clerk named Cadogan West had been found dead on the underground tracks,

with seven pages of top-secret submarine plans in his pocket.

Though at first it appeared to be a simple case of treason and murder,

certain details caught Holmes' attention,

the absence of a train ticket on the murdered man, the peculiar location of the body,

and most crucially, the missing three pages of the Bruce Partington plans.

After examining the scene at Allgate Station, Holmes has spotted something revelatory in the railway points,

something that prompted him to request an urgent list of every foreign spy operating in London.

Now, Holmes is about to tell Watson what he has deduced. His eager face still wore that expression of intense and high-strung energy,

which showed me that some novel and suggestive circumstance had opened up a stimulating line of thought.

See the foxhound with hanging ears and drooping tail as it lulls about the kennels,

and compare it with the same hound as with gleaming eyes and straining muscles it runs upon a

breast-high scent such was the change in homes since the morning he was a different man from the limp and

lounging figure in the mouse-coloured dressing-gown who had prowled so restlessly only a few hours before round the

foggirt room.

There is material here, there is scope, said he.

I am dull indeed not to have understood its possibilities.

Even now they are dark to me.

...