This one, which appeared in the June 10, 1956 issue of This Week, and was reprinted in Q.E.D. as “No Place to Live,” is an anomaly for the stories the cousins wrote for This Week: it has a large cast of characters, and is a tad bit more complex.
A man, Brock, takes in boarders in his rented rooms, at a profit. The landlord finds out, and is not happy. Somebody finds and steals a large sum of money, and Brock ends up dead. The story is, of course, rushed, and probably would have been better served longer, with time to flesh out the characters, their lives, how they ended up in an illegal sublet, and so forth. Oh well.