On December 29, 1906, Theresa's mother sent her a postcard from Ciudad Juárez, México. The postcard shows several small adobe houses and large trees on the banks of an irrigation ditch which was dug by hand in about 1750. The card reads: "We stopped here for the day & it is such a quaint & fascinating place. We wish that you were here too. Much love from Mother and Francis."
Theresa had a granddaughter named Josephine, a daughter of her son Charles Edwin Barnum, who sent her several cards and letters in 1912.