The man who knocked on an apartment-house door in a dingy corner of Barcelona identified himself as the lampista, the man from the electric company. He entered, and inspected the meter in an apartment occupied by a thin woman and a bearded man who called himself Josè Planas. The lampista noted carefully that the apartment had no back door.
Next morning the lampista, who was Chief Inspector Pedro Polo of the Social Brigade (Spain's FBI), gathered some of his men and went back to the apartment.
They knocked on Planas' door, calling out that it was the postman. When the door...