You could have seen it in your parents' or grandparents' copy of Tales Told In Holland, which was put out by Random House in the Thirties and again in the Fifties, had a Delft-blue cover and in particular as pertains to this tale, an illustration of a mermaid on a rock, with a green and blue tail, sitting forlornly on very green grass, being discovered by a little Dutch boy in dark Dutch trousers and a red jacket and those caricature Dutch shoes.


That's where I know it from, anyway.