Johnny Liddell turned off Park Avenue and headed east along Fifty-sixth Street. A fog, reminiscent of the clouds of smoke at the bar he had just left, had come up from nowhere. Passersby were ghoulish shapes behind an opaque curtain, street lights a yellow blur in its swirling depths. His apartment was in a converted old brownstone house in the middle of the block. As he reached the steps leading to the vestibule, a girl materialized from the gloom, caught him by the sleeve. “I thought you’d never get here, Johnny Liddell.” He had an evanescent glimpse of a small pert face, ash blonde hair and wide blue eyes. She kept looking over her shoulder as though she feared and dreaded the shadowy fingers of the fog. “If I’d known you were here, I’d have run all the way home,” he grinned. “Troub

