Thanks, Jack!
At some point in my comings and goings and (re)packings at the beginning of August, I evidently stowed it in the mesh side pocket of the caddy I use for my car-cleaning supplies-- a caddy that alternately lives in the back of my car ("boot," for those who are convinced a "trunk" indicates the front of an elephant), the garage, or more recently on a storage shelf in our basement.
Towards the end of attacking basement messes yesterday, yea unto the later hours, I sat down at the bottom of the steps and was soon joined by one of our cats. I held him for a good long while, eventually looking around to survey the ongoing disarray.
I was absently staring at the caddy, off its usual shelf and at an angle on the floor with its side pocket towards me, when I realized I was staring at my Strix through the mesh.
... While finding it at all is grand, I am also relieved to discover that, while forgetful, I had not been
careless with it-- the specter of which had been haunting me in the knife's ongoing absence. That pocket was actually a good, safe place for the knife(!).
~ P.