Out in the main part of the hall, a place of honor was given to what may have been the oldest of all instruments, a seven-note marimba of phonolitic schist discovered in Indo-China in the 20th century and thought to be at least 5,000 years of age. The xylophone-type rack was modern; for twenty-five years, Brian had obeyed a compulsion to keep it clear of cobwebs. Sometimes he touched the singing stones, not for amusement, but because there was an obscure comfort in it. Unconcerned with time, they answered even to the light tap of a fingernail. On the west side of the Hall of Music, a rather long walk from Brian's cave, was a small auditorium. Lectures, recitals, chamber music concerts had been given there in the old days. The pleasant room held a twelve-foot concert grand, made by Steinway in 2043, probably the finest of the many pianos in the Hall of Music. Brian had done his best to preserve this, setting aside a day each month for the prayerful tuning of it, robbing other pianos in the Museum to provide a reserve supply of strings, oiled and sealed up against rust. No dirt ever collected on the Steinway. When not in use, it was covered with stitched-together sheets. To remove the cover was a sober ritual; Brian always washed his hands with fanatical care before touching the keys. Some years ago, he had developed the habit of locking the auditorium doors before he played. Even with the doors locked, he would not glance toward the vista of empty seats--not knowing, nor caring much, whether this inhibition had grown from a Stone Age fear of seeing someone there or from a flat, reasonable certainty that no one could be. * * * * * The habit might have started (he could not remember precisely) away back in the year 2076, when so many bodies had drifted down from the north on the ebb tides. Full horror had somehow been lacking in the sight of all that floating death. Perhaps it was because Brian had earlier had his fill of horrors; or perhaps, in 2076, he already felt so divorced from his own kind that what happened to them was like the photograph of a war in a distant country. Some of the bodies had bobbed quite near the Museum. Most of them had the gaping wounds of primitive warfare, but some were oddly discolored--a new pestilence? So there was (or had been) more trouble up there in what was (or had been) the Soviet of North America, a self-styled "nation" that took in east New York State and some of New England. Yes, that was probably the year when he had started locking the doors between his private concerts and an empty world. He dumped the venison in his cave. He scrubbed his hands, blue-veined now, but still tough, still knowing Mozart, he thought, and walked--not with much pleasure of anticipation, but more like one externally driven--through the enormous hall that was so full and yet so empty, growing dim with evening, with dust, with age, with loneliness. Music should not be silent.