How came these two men--if there were two men--into an empty house?
What has become of the cabman who drove them?
How could one man compel another to take poison?
Where did the blood come from?
What was the object of the murderer, since robbery had no part in it?
How came the woman's ring there?
Above all, why should the second man write up the German word RACHE before decamping?
I confess that I cannot see any possible way of reconciling all these facts." My companion smiled approvingly.
"You sum up the difficulties of the situation succinctly and well," he said.

"There is much that is still obscure, though I have quite made up my mind on the main facts.

As to poor Lestrade's discovery it was simply a blind intended to put the police upon a wrong track, by suggesting Socialism and secret societies.

It was not done by a German.

The A, if you noticed, was printed somewhat after the German fashion.