Yellow Pencils and Dead Phone Lines

Why did Henry David Thoreau care so much about pencils—and why did some phone numbers keep ringing long after they were disconnected? In this episode of The Box of Oddities, Kat and Jethro wander into two stories that shouldn’t be connected… but somehow are. First, we look at the surprising industrial legacy of Henry David Thoreau, long before Walden Pond. As a young man working in his family’s pencil business, Thoreau applied chemistry, precision, and quiet rebellion to fix America’s worst pencils—changing how graphite was processed, how pencils were graded, and why most pencils are still yellow today. It’s a story about innovation, independence, and how financial stability made room for deep thinking… and eventually, deliberate living. Then, the episode takes a darker turn. During the 1960s and 70s, people across the U.S. reported receiving phone calls from businesses that had been closed—sometimes for decades. Funeral homes. Pharmacies. Local shops. Callers insisted they had just spoken to someone on the line. Engineers found nothing. Phone companies found no active service. The FCC investigated. No explanation stuck. What emerged instead was something stranger: the idea of telecom afterimages—echoes of human habit lingering in old copper wire. Conversations without ghosts. Voices without intent. Systems that didn’t quite know how to forget. This episode explores how infrastructure remembers, how absence isn’t always clean, and why the most unsettling stories are often the quietest ones—ordinary conversations that shouldn’t exist, but somehow do. Learn more about your ad choices. Visit megaphone.fm/adchoices