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Texas Rangers, Ranchers, and Realtors: James Hughes Callahan and the Day Family in the Guadalupe River Basin
January 8, 2022 @ 10:30 am - 12:00 pm
Does your family’s history tell a larger story about Texas history? Join us for Thomas McDonald’s talk on his book, Texas Rangers, Ranchers, and Realtors: James Hughes Callahan and the Day Family in the Guadalupe River Basin. McDonald’s book is the product of research into his ancestors James Callahan and Sarah Day. The Callahan and Day stories reflect Texas’s immigration history, its revolution and later statehood, ranching, and land development in the Guadalupe River Basin. This program is a must for anyone who wants to provide larger historical context to their own family history.
Thomas O. McDonald is a retired R&D pharmaceutical executive, an independent scholar of Texas history, and a seventh generation Texan. He retired from Alcon Laboratories, an American Pharmaceutical company specializing in eye care products, in 2004. Thomas holds a Bachelor of Science, as well as a Master of Science in Biology from Texas Christian University. He also earned his PhD in Cell Biology from Tulane University and completed the International Senior Managers Program at Harvard Business School. His family, community, teachers, and Alcon experience shaped Thomas’s firm commitment to education.