I kicked the nearest filing cabinet. Hopping and swearing. I went behind the screen that concealed the really important objects in my office—the sink and hot plate and coffee maker—and plugged in the last-named article. I fully intended to kill Gerda, but I figured I had better have a cup of coffee first. Otherwise I might stumble on the stairs and break a leg before I got my hands around her throat.

While I drank my coffee, I glanced through the mail but found nothing that improved my disposition, especially after I broke a nail prying off a staple. It was the usual assortment: notices of meetings, circulars from academic presses offering books nobody could afford on subjects nobody knew anything about, and letters from students asking permission to use the collections or to reproduce photographs.

The stack of mail was pyramid-style, with the largest items on the bottom. I worked my way grimly down to the base—a coarse brown envelope approximately 8 by 10 inches in size. One of those well-known plain brown wrappers? It was plain enough; no sign of writing, not even my name. The heavy tape sealing the flap had been slashed, leaving edges so sharp I cut my finger when I reached into the envelope. Gerda’s famous paper knife, honed to the keenness of a headsman’s sword. One of these days someone was going to stab her with that knife. It might be me.

She hadn’t stapled the enclosure to the envelope, probably because her diabolical tool could not penetrate the heavy cardboard on which the photograph was mounted. It was a black-and-white photo, probably enlarged from a snapshot; the faintly fuzzy focus suggested amateur photography. As I stared at it, a flash of memory rose and fell in the murky depths of my alcohol-fuzzed mind, but I couldn’t get a grip on it. Yet I knew I had seen a photograph like that before.

The subject was a woman. The skin of her face had sagged and her thin mouth was set in a straight, expressionless line. She could have been any aging Hausfrau, except for her costume. A fringed diadem several inches wide encircled her brow. From it dangled ropes and chains of some metallic substance. Her earlobes were pulled down by more chains and dangles; the bodice of her plain dark dress was almost hidden by necklaces, row on row of them.

I turned the photograph over. The back was plain gray cardboard, with no inscription or photographer’s imprint. Why the hell had someone sent me a picture of his mother dressed up for an amateur theatrical performance? His mother the soprano? She didn’t resemble the conventional contralto stereotype; her chin sagged with the weariness of age, and her features were pointed and meager, like those of a rain-soaked bird. But the gaudy fake jewelry suggested one of the more exotic operas, such as Lakmé or Aïda.

I inspected the envelope again. It was still blank.

Eventually the caffeine penetrated my brain, and I gathered enough strength to pry myself off my chair. There was a pile of work waiting for me, but I decided that first I would go and kill Gerda.