The other had hair on his back but couldn't bark.

Neither of them was the young Bourbon.

The Great Detective continued his search.

He stopped at nothing.

Secretly, after nightfall, he visited the home of the Prime
Minister. He examined it from top to bottom. He measured all
the doors and windows. He took up the flooring. He inspected
the plumbing. He examined the furniture. He found nothing.

With equal secrecy he penetrated into the palace of the Archbishop.
He examined it from top to bottom. Disguised as a choir-boy he took
part in the offices of the church. He found nothing.

Still undismayed, the Great Detective made his way into the home of
the Countess of Dashleigh. Disguised as a housemaid, he entered the
service of the Countess.

Then at last a clue came which gave him a solution of the mystery.

On the wall of the Countess's boudoir was a large framed engraving.

It was a portrait.

Under it was a printed legend:

THE PRINCE OF WURTTEMBERG