The Great Green Crayon Mystery

I want to share with you a mystery that has been going on around our house.  We call it the Great Green Crayon Mystery.  In a nutshell, mysterious green crayon marks have been appearing on our walls in our entranceway and our upstairs hallway, and now, most recently, on the ceiling of the bathroom.

I know.  I know.  I can hear you from here.  You think Toddler did it.

Well, unless Toddler was crayoning around the house since before he was even conceived, and unless he has found a way to reach the ceiling of the bathroom ... you are wrong. 

Now, don't misunderstand.  Toddler has done his fair share of inappropriate crayoning when my back was turned.  He has gotten the floor, and old baby bed circa 1970s that was in the hallway or disposal.  (Don't report me to social services.  We didn't use it.  The last baby that used it was me.  If you want to know why I still had it at all, see this post.) 

The best we can figure, the green, crayon-like markings began appearing on our white walls some time after we hired our housekeeper, who no longer works here. I guarantee you she was not walking around this house with a green crayon in her hand. In fact, we think they are still appearing even now, although we might just be on the lookout for them. (Hard to tell.) The marks started in the entraceway, in the stairs going up to the bedrooms. Something she was carrying could easily have bumped the walls, and this is our very best theory, given that the marks appear in hallways and stairwells, but not in wide open rooms. Exactly "what" she might have been carrying is beyond our comprehension.

Even better, we have never successfully removed any of the markings, unlike the red crayon in the kitchen. In the process of our investigation, we learned that metal frames leave graphite-like marks and the vacuum cleaner leaves dents if you brush it against the wall. We now know what fingerprint, and newsprint (and fingerprints from newsprint) look like on walls, as well as what can happen when a big framed oil painting and a white wall meet forcibly. We can describe what cat pee on walls looks like, as well as baby vomit, milk, puree, and a host of other food and food products.

At no time, though, have we ever discovered what leaves a mark like green crayon. Any suggestions or should I just blame this one on Entropy and Chaos, too? To help you decide (and in blatant copying of my fellow blogger John Cave Osborne author of And Triplets Make Six), I've included a video, below.