It comes from Today Tomorrow, his Collected Poems, which span, impressively, the years 1933-2000 (Polygon, £14.99).
SOUP AND SHERRY
It was 3.30 in the afternoon, mid-November,
and I was calling on Bill Gillies
(Sir William Gillies, R.S.A., R.A. etcetera);
'Come in,' he says 'We'll have soup.
You won't be drinking and driving
so we'll have sherry.' Didn't like
the idea of the combination, but
the lentil soup was hottering
on the stove so there was nothing for it
but swallow it with the sherry.
There was a painting on the easel
of Temple, the village where we were.
It didn't look like the rainy street
off which I'd just come. In it
the moon was up and silvering
the length of it, pavement, tarmac road,
squat houses, and touching up
two black trees, winter trees,
but each twig starting from its branch
as if Spring were in it. I looked out
the window. Nothing like the painting.
No glimmering windows along the street.
He was stirring the soup. He didn't look up.
'I catched a painting last night.'
I could see him casting on the Esks,
North Esk, South Esk, Leithen Water, Falla.
How many paintings got away? 'Soup's ready.'
How many poems slip back into my dark sea?