Arvind Sen Episode 1: The Vanished Widow It was on a sultry September afternoon that I first heard of the case that would change the course of my modest career. The ceiling fan in my small office on College Street turned sluggishly, stirring the stale air, and I was almost dozing over a week-old newspaper when the phone rang. The voice on the other end was brittle, lined with suppressed panic, and unmistakably aristocratic. “Mr. Sen? This is Mrs. Chaudhuri of Alipore Lane. I need your help. My sister-in-law has disappeared. No one believes me, but something terrible has happened.”…