<https://www.americanroadmagazine.com/forum/topic/1933-building-the-illinois-national-road/#comment-17953>
<http://schema.org/text>
"Jim, \n  \nI would look into Caterpillar tractors and see if I could find out when the model in the photo was made.  That would help fix a date. \n  \nDave \n  \nKeep the Show on the Road! \n"
<https://www.americanroadmagazine.com/forum/topic/1933-building-the-illinois-national-road/?tab=comments#comment-17947>