They supplied their own reviews of these arguments. Ever since I turned eighteen, Dad had routinely taken me out for ‘a pint’ at the local pub. A pint, precisely: two half-pints of bitter, followed by a further two ordered with hints of wicked indulgence and declamations that that had never been the plan. After his retirement, those drinks turned into discussions of the arguments. ‘Your mum and I have been arguing a lot,’ he would say, every time, as if he didn’t say the same thing every time. He never criticised her, and I truly believe that it would never even occur to him to do so. But he would sadly acknowledge the fact of the arguments, without giving the slightest detail as to what might be causing them, and expect me to be sympathetic.

(My sister reported that she was getting the exact same from Mum, often at precisely the same moment. Mum did criticise Dad, but only in the vaguest, most all-encompassing terms: ‘Your Father!’, uttered as if his very existence was an affront we had all quietly tolerated for too long.)

Then, a transformation. After about a year of arguments, including the hellish Christmas of 2012, my parents decided they needed a holiday. For twenty-five years, French beaches had known their presence in the summer. Their knowledge of the French coast was probably rival to that of Allied high command, June 1944. But this time, in the spring of 2013, they went on a city break, to Brussels on the Eurostar.

They stayed four nights and I received three postcards. Dad ate a horse steak. Mum ate a waffle sold from a van. They were photographed in front of the Atomium, the Palais de Justice, the Tintin Museum, the restaurant where Dad ate the steak, the van from which Mum purchased the waffle, and the headquarters of the European Commission.

A mania took hold. An addiction, maybe. No city in Europe was safe. It didn’t really matter where this postcard came from, and I already knew the gist of what was written on the back. It would join a small pile of very similar postcards on the kitchen counter, next to a cork board thoroughly covered with a bright collage of classical columns, Gothic spires, Moorish palaces, Dutch gables and high pitched Nordic roofs.

The era of arguments came to an end. So began the era of city breaks.

Standing in the icy doorway for so long had completely thrown me off my stride. I opened another can of Stella, forgetting that I already had one on the go.