lbr if erik’s mum was still alive charles would not HESITATE to call her every time erik started something megalomaniacal like
“hello, frau lehnsherr? its charles again…oh not too bad, trapped under a bit of fallen debris but hey, what can you do? and your lovely self?…oh good, good…excellent, I am so pleased that turned out…well you know I absolutely hate to call you at this time of night but erik’s having a bad spell again…yes the debris was him, I’m afraid - oh, he’s looking this way - ERIK! erik darling I’ve got your mother on the line, do you want to-? no? oh dear, he’s shaking his head…well I can have the plane in germany in just a few hours if you’re fit to fly…yes, haha, maybe it WOULD be easier if you just moved over here…well if you want to, I know a fellow who- oh, wait a mo, erik’s lifting the debris and he’s turned the cameras off, looks like he’s changed his mind on today’s ‘kill all humans and take over the world’ plan…well nevermind, thank you anyway love, always a pleasure talking to you…yes, I will make sure he calls you back later…okay? great, okay. auf wiedersehen, bye.”
Returning to France I spent some months in a research into the coal-tar derivatives, which I conducted in a laboratory at Montpelier, in the South of France. Having concluded this to my satisfaction, and learning that only one of my enemies was now left in London, I was about to return when my movements were hastened by the news of this very remarkable Park Lane Mystery…
(Okay, the map marking isn’t in “the South of France,” but France was Holmes’ last stop before coming home. Close enough to establish reference-via-trajectory, let’s say.)
There was nothing in it to suggest a clue,—some clothes, some books, and a considerable number of curiosities from the Andaman Islands. He had been one of the officers in charge of the convict-guard there.