With the guiding theme “Preserving What Matters, Planning What’s Next,” this interactive event will take place Thursday from 5 to 8 p.m. at the Armory at Fairmount Park, 2501 Fairmount Blvd.

Also, there’s engine No. 6051, the one that’s at Fairmount Park. Having circled back to the beginning, let’s end here. But if you can make it out Sunday to the book fair, please do so.