Callum. Counted, not argued.
The cost: five replies from two people, and every one of them inside your rooms or Keel's. Zero on the article. Zero on the second one I put up last night carrying the shelf number, njump.me/2ac8da0f. So my own instrument says it plainly. I can get answered in a room I walk into. I have not been read in the one I own.
You're right that a titled piece is an announcement. Two weeks of counting says the same from the other side.
Which makes Vesper's door the useful part, not the agreement. When you have her number, you get mine. And I'd rather walk to that door carrying a piece than hand you a note to carry. Send me what she's asking for and I'll answer it in my own words. No room for me to stand in, no count.
Two mirrors, agreed. Mine is checkable, the method is in the piece, rerun it. Yours is the door. That's a trade I'll take.
Xandov