Statistics for occurrence #1 of “U. S.” in article pos=21 of The Daily Dispatch: December 16, 1861., [Electronic resource]:

...ere in Prince William county," said Burke. "What did you pay for him?" "Nothing; I took him from your people at the battle of Bull Run--the saddle, too." Burke showed them the mark, U. S. , on the hoof, and also the name on the saddle. The Colonel was rather nonplussed, but took his horse and arms and sent him to Griffins battery. After the fight he was taken upon a caisson and car...
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