I think it was in Harlan Ellison’s first ‘Glass Teat’ TV column collection…

[UPDATE: a 5FF fan corrects me — it was in Strange Wine.)

The anecdote about the late night talk show host — Tom Snyder? — who received two letters from a loyal viewer.

The first to inform him that she was going on vacation for a couple of weeks.

The second let him know that she was back home — so he could go back to doing his show now…