Well, maybe you thought you heard the last word, but with the swirl of
controversy I guess you haven’t. Seems that while we think Mr. Carder never
used a middle initial the evidence is mounting that occasionally he did in the US
and likely did in England.
Bobby Rockwell says: I have seen the blue prints for the Pyrex teapot that
Corning Glass made. Credit is given on the design to F.C. Carder. Apparently
Corning Glass also had a record of his middle name and it was being used during
his American years since the Pyrex teapot design, I believe anyway, was done in
the twenties or early thirties.

Then Greg Merkel, (tongue in cheek) observes:
Hopefully the matter is now settled. But, of course, we both REALLY know that
the reason he put the “C” in the engraving was that he was already secretly
planning on coming to “C”orning, and wanted to give one final jab to the Brits.
Gail Bardham at the Rakow sent me a signature on a letter written while he lived
in England that looked like it may have had a “C” as a middle initial. Although
really hard to tell.
Some wrote in to say enough is enough. However, when dealing with history,
provenance and trying to be certain of what we have, the clues are few and we
need to struggle through exercises like this to have a chance to find truth
sometimes. What we often forget is that the Rakow Library is a wonderful
repository of background information. Also, asking questions of other collectors
often leads to finding information from others