steve from saint louis, mo on 1/14/2009 10:08:40 AM:
This link will get you to the 1983 Katy Railroad Map.
http://www.katyrailroad.org/map.htm
The 1904 Railroad Map is also available link at the bottom of the page above. It shows the link to Hannibal, MO for instance, that was abandoned long before the 1983 map came out.
Looking at the maps, in 1904 and 1983 a Katy Link was active to San Antonio, TX, which if you wanted to go to Corpus Cristi, would have been a logical point to get on another line to go to Corpus Cristi. What that line is or was, I do not know.