half inch long and a bit under a quarter inch in diameter, with both ends faintly broken-ragged, was identical in size and shape to the unbroken spokes in the sign!

Then I noticed something else. The trefoil ornament in the middle did not look the same as I recalled them. I took Thorndyke's card out of my pocket and looked at the stereo. I compared the picture against the real thing before me and I knew that I was right.

The trefoil gizmo was a take-off on the fleur-de-lis or the Boy Scout Tenderfoot badge, or the design they use to signify North on a compass. But the lower flare of the leaves was wider than any of the more familiar emblems; almost as wide as the top. It took a comparison to tell the difference between one of them right-side-up and another one upside-down. One assumes for this design that the larger foils are supposed to be up. If that were so, then the ones along that road out there in or near Yellowstone were right-side-up, while the ones along my familiar highway were upside-down.

I goaded myself. #Memory, have these things been turned or were they always upside-down?#

The last thing I did as I turned off the highway was to stop and let my esper dig that design once more. I covered the design itself, let my perception roam along the spokes, and then around the circlet that supported the spokes that held the trefoil emblem.

Oh, it was not obvious. It was designed in, so to speak. If I were asked even today for my professional opinion I would have to admit that the way the circlet snapped into the rest of the ornamental scrollwork was a matter of good assembly design, and not a design deliberately created so that the emblem could be turned upside down.

In fact, if it had not been for that tiny, broken spoke I found on the floor of the Harrison garage, never in a million years would I have considered these road signs significant.

At the post office I wrote a letter to Phillip Harrison:

Dear Phil:

I was by your old place today and was sorry to find that you had moved. I'd like to get in touch with you again. If I may ask, please send me your forwarding address. I'll keep it concealed if you like, or I'll reply through the post office, concealed forward.

As an item of interest, did you know that your house has lost its deadness? A medium-equipped esper can dig it 

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