John Patterson signed a loyalty statement following the US Civil War. Below is the transcribed letter (for easy reading) and a photo of the letter.
United States of America
The State of Texas, County of Hill
I, John Patterson, do solemnly swear in the presence of Almighty God that I will hereafter faithfully support and defend the Constitution of the United States and the Union of the States there under and that I will in like manner abide by and faithfully support all laws and proclamations which have been made during the existence of the present rebellion with reference to the emancipation of slaves so help me God.
Sworn to and subscribed before me this 19th day of November 1869 to certify, which I hereunto set my hand and the seal of office the date above mentioned.
John A Purnell