Day 8.194: This interesting thing...

At the Maritime Museum last weekend I had pretty much this conversation with E5N1.

Me: Hey, look at that really interesting looking tool back there - what number is it?

E5N1 (looking at silhouette guide): Number 25.

Me: Oh? Well it looks really interesting - right? I wonder what it's called...

E5N1 goes to look at the key...

Followed by unseemly laughter.