My brother and Thanksgiving: The True Story

Recently my brother Kip and his family--Lisa, Julia and Ford--spent a few days with us. I showed them the galley of Thanksgiving: The True Story and where I quoted Lisa about Thanksgiving Day football games. (p. 100) Later in their visit, Kip walked by me and simply said "St. Augustine."
"Huh," I replied.
"St. Augustine" he said and walked away.
What is he talking about? I wondered.
Suddenly I got it.
"Kip," I called after him. "Did you just read chapter 1 in Thanksgiving?"
(St. Augustine, Florida is one of the 12 competing claims for the location of "first" Thanksgiving that I write about in chapter 1.)
"St. Augustine," he said.