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[Since writing this I have been told I was right and I was very, very wrong. The picture shows the actual fries I was given and on which I based my post. Please read the comments for updates. Also, this chip wagon may have moved.]
The London Free Press has a history of running excellent, quirky little pieces, like Staycations or Our Five Your Five. I took careful note of the the OFYF article Five Great Places to Get a Bite on the Run. I learned about Fries 'R' Us in St. Thomas from that piece. Driving from London, the red wagon is on the left, at the top of the Talbot Street rise leading into the city. [ . . . or at least, was.]
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I just must go back and research this topic some more.
Cheers,
Rockinon.