This bottle stopper was recovered during excavations in 2014 of the Adair cabin site, home of Reverend Samuel and Florella Brown and their family, in Osawatomie, Kansas. While Osawatomie was much involved with the abolitionist movement during the "Bleeding Kansas" years, this glass bottle stopper was deposited much later. The Pyrex brand bottle stopper was likely used for laboratory glassware.
Kansas Memory
Kansas Historical Society
Pyrex Glass Bottle Stopper from the Adair Cabin, 14MM327 - 2