Longest NG Railroad in US and Texas NG questions

In my not so good memory, I seem to recall someone telling me that the longest narrow gauge railroad (3 ft specifically) in the united states once ran from Fort Worth, Texas, to Chicago. After a few google and other searches, I have come up with no evidence this was true.

Does anyone know anything about this possible NG line?

If that wasn't, what was the longest narrow gauge railroad in the united states? I guess this could be two answers, both the single longest railroad, and the longest network of railroads...

In my research, I did discover that William Jackson Palmer bought a railroad called the Texas Mexican Railway, formerly the Corpus Christi San Diego and Rio Grande Railroad. This railroad, as the name suggests, ran from Corpus Christi to San Diego by 1877, and there were plans to run to Northeast and West Texas that never happened. This railroad also became the first Mexican-American railroad to cross the border. According to Wiki, it later became part of the KCS railroad.

Details here: [en.wikipedia.org]

I wonder if Mr. Palmer intended on eventually connecting this railroad with the D&RG. I have heard that the original plans would take the D&RG through Texas anyway...

Casey Akin

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