The piece depicts scenes and thoughts on a stroll when the fog makes familiar sights appear mystical and one's imagination runs to fantasy. There is a little traffic with cars creeping along, a few other pedestrians, some stores lighted and open - mostly one is alone with one's thoughts.
It is a serial 12-tone piece with rotation. That is, when all 12 tones are used, the cycle can be started at a different point. The row is the same as the one Berg used in his violin concerto: G, Bb, D, F#, A, C, E, G#, B, C#, Eb, F. This interesting row allows tonal harmonies to appear.
Unless I have made a mistake the serial rule is followed thoughout. The piece opens with the row in retrograde order.
The mp3 is here
The ensemble is a sextet: flute, bassoon, horn, two violins and viola. I started this as a quartet without the horn and second violin - the horn adds texture and smoothness. The instruments are GPO.
Edit: a less dry version uploaded