Back in the 1870s, someone in Liège, Belgium got the bright idea of using cats to deliver the post. It didn’t go well. Thirty-seven felines were fitted with waterproof pouches containing messages for their owners and turned loose in an unfamiliar place some twenty miles or so away from their domiciles. Now, cats have great homing instincts, so they did all return to home and hearth (the fastest took five hours, the slowest close to a full day), but apparently none were willing to perform this little ‘trick’ on a daily basis. Or go to houses other than their own. I’m also willing to bet that not all the messages even got through. I’m sure some of the moggies managed to divest themselves of those annoying pouches long before reaching home.