Write for 15 minutes—anything, whatever comes to mind—then stop and share what you’ve written. 

That’s the simple directive that David Glaubinger, an 85-year-old Fairfax resident, gave a handful of locals at the first gathering of a new writing group in Point Reyes Station. For those in need of a writing prompt, he suggested choosing one from the Point Reyes Light’s sheriff’s calls.

The monthly group, which debuted in July, is part of an…