A yesterday Mackerel is a deadly instrument of a yoke altogether. There is no fish which changes so totally in taste and even appearance overnight as a mackerel. What is plump and silvery and succulent today is awful dead and smelly and has the wrong taste tomorrow. Nothing looks as dead or as unsavoury as a Yesterday Mackerel. Even our cats turn up their noses at them and walk away.
Cats have good taste.
But the concurrent reality with mackerel is that they shoal in such numbers off the western coast that, when they are caught, they are caught by the ton. One is that it is murder rather than fishing. The second is that what you pull out is always more than you can eat and so, sadly, your sons, too, will be arriving at some poor divil's door twelve or thirteen hours later with a plastic bag of smelly Yesterday Mackerel. I would not wish it on my worst enemy. The thing is, in common decency, you have to accept the bag as if it were full of gold.