" Drummond, a designer, historic preservationist, and neophyte rehabber, told CNN he was removing outside skirting along the bottom of the mudroom attached to the house when a mysterious package fell out.

Finally we mystery shopped several properties to see how they performed on the ground. 

The way I can figure most of those empty listings are either with management companies (most) or they don't have any clue how to optimize AirBnB - which, turns out, is NOT a mystery.  

This property is a mystery. 

Its just one of those "mysteries..."

This is turning into a real Halloween mystery.

(But conventional won't finance a single wide, so what mysterious runaround could this be?) 

The universe works so mysteriously. 

I'm just not a happy person.From childhood’s hour I have not beenAs others were—I have not seenAs others saw—I could not bringMy passions from a common spring—From the same source I have not takenMy sorrow—I could not awakenMy heart to joy at the same tone—And all I loved—I loved alone—Then—in my childhood—in the dawnOf a most stormy life—was drawnFrom every depth of good and illThe mystery which binds me still—From the torrent, or the fountain—From the red cliff of the mountain—From the sun that round me rolledIn its autumn tint of gold—From the lightning in the skyAs it passed me flying by—From the thunder, and the storm—And the cloud that took the form(When the rest of Heaven was blue)Of a demon in my view—Edgar Allan Poe

You are trying to solve a mystery.