Surely it would take an incredibly long time to have a conversation this way, even if the passing pilot had the chart available to consult with? And anyway, if you need food and water you’d probably be better off going and looking for food and water instead of exhausting yourself by spending hours clearing the ground and collecting all the materials you need, then spending all afternoon laying out a giant F in a forest clearing.
This is real hard drive detritus: two obscurely named files in a folder from 2006 called “Harmsworth 1892”. I’m guessing 1892 might be the year, but I haven’t been able to find out any more about these images, which seem to show the recompense a man could expect to receive from a court if he was injured either at work or possibly in war. They’re interesting, anyway. Note that in the first diagram, losing one’s moustache (third from right) appears to be worth an impressive (for a century ago) £10, while losing an ear (second from left) is only worth three times as much at £30. And if you’re lucky enough to lose both arms and both legs, you could be in for £1000. Then you could buy 100 moustaches to console yourself.