in case you were still baffled by our clues, our last one was an ear, which is the organ affected by deafness.
It seems a strange thing to me that anyone would want to draw an ear at all, (unless that is where your particular fetish lies…), let alone spend any time labouring over the correct shading etc.
However an awful lot of work has gone into this text, researching the ear and all of its measurements, and the card is able to inform us that our ears are as long as our noses, and run parallel to them. In addition that the ear is half its own length at the widest point. And furthermore, if it is divided into three equal parts, the middle division will be the size of its orifice (or lug-hole).
Now I am sure you are all itching to go and fetch a ruler and check all of this out for yourself, and if so, do report if the card is right...! And after that feel free to go out and make your friends check their ears as well...