Vegetarian warfarin

Last night I read in 'Monsieur Lundi' (reference 2) about a vegetarian alternative to warfarin - warfarin as a poison for rats rather than warfarin as a medicine for humans that is.

A vegetarian alternative that was once used in parts of what was for a short time called Malaysia to murder your most worst enemies in a most unpleasant way.

You take a number of ears of something like barley, as illustrated left. You then snip off the sharp ends of the whiskers, ends which you perhaps make about five millimeters in length. Not sure how many you need, but you then hide enough of them in some otherwise attractive food, in the case of this story, in a popular cream cake called a religieuse, one of the inventions of the legendary Marie-Antoine Carême.

The sharp ends wind up, undigested, in the small intestine, which they slowly but surely perforate all over the place, resulting in peritonitis, blood poisoning and an unpleasant death, I think in that order.

The cause of which will be unknown, unless there happens to be a careful and knowledgeable pathologist on the case.

Reference 1: https://psmv4.blogspot.com/2019/02/warf-warf.html.

Reference 2: Monsieur Lundi - Simenon - 1936. Which should have been in Volume IX of the collected works, but this volume seems to be presently unavailable and I am working from a paperback printed in Italy. A matter to which I shall return in due course.

Reference 3: https://en.wikipedia.org/wiki/Religieuse.