Box 13 - Double Trouble

Dan Holiday receives a letter in Box 13 that reads "If you're interested in preventing a murder, come to 327 North Greeley Street in Edgemont. It should take you only three hours by train to get here, but you must come at exactly 3 30 PM or it may be too late, Pat Kennedy". The entire letter was typed, even the signature at the bottom. Susie asks "How long will you be gone this time Mr. Holiday?" Dan says "Well, that's a little hard to tell Susie. I think it depends on Pat Kennedy, whoever he or she is". Susie says "I don't like letters that have only typed signatures at the bottom". Dan asks "Why not?" Susie says "Well, it always makes me think that someone else wrote it". Dan says "And that's exactly what makes me think this may be very interesting". Some time later, Dan got off the train at the Edgemont station platform at 3:00 o'clock. A taxi left him in front of an apartment house at the Greely Street address at 3:20, ten minutes before the deadline. Dan walks into the lobby and sees an uninterested desk clerk. The clerk says "Yeah?" Dan asks "Is there a Pat Kennedy living here?" Clerk says "Uh huh. Miss Pat Kennedy. Why?" Dan says "I'd like to see her". Clerk says "Apartment 1-B, straight down the hall". Dan asks "Aren't you going to ring her up first?" Clerk says "There's no phone in her place. Be sure to knock first". Dan says "Oh sure, that's one of my good habits". At the door, Dan knocked. Getting no reply, he tried the door. It was open, so he walked in. Dan says "Miss Kennedy? Pat Kennedy?" Dan walked into the apartment a little farther. A clock on a table ticked away, it's hands at 3:23. There was a window open in the room. He walks to the bedroom and stops. It was Miss Kennedy. Suddenly, a man appears and says "Don't move Bud. Get away from her". Dan says "You better send for a doctor". The man walks up and says "It's a little late for that. She's dead".