I was of course and I don't really have a "pilow stone'. As for the deconversion, I don't know how much of an expert I am but I'd be very happy to help out where I can. There's a discussion right now I think you would benefit from enormously if this is your interests. It's in that group I told you about, Welcome All Adherents and entitled, "How do I know that your god is The One, True God". It is a very illuminating conversation I've developed over the years.
A "pillow stone" is an old tale of a "magical" stone that protects and comforts the bearer. The Knights Templar used them supposedly to sleep on, hence the name. It is shaped a bit concavely and the head fits nicely into it.
I just saw your comment on my page. Glad you replied. You indeed manage quite well to write in french, as you have shown. I know where the Parc Régional is... I've been planning to take a bicycle ride there but didn't yet. Maybe next summer. I'm located right in the center of Longueuil and I don't go often to Montreal... especially during winter. I like cold weather so much that I almost hibernate all winter long. lol If I happen to go downtown Mtl I'll drop you a message.