This passage fixes the date and location.
"Shortly after this we were mustered into the Confederate service by Col. W. C. Young, Oct. 14, 1861, and took up the line of march for the seat of war, crossing Red River near where Denison now stands. The next camp of note was at Boggy Depot, where we spent the night."
Who is Whaley in the next passage?
"From this point Captain Whaley was sent in advance to procure subsistence for the men and horses, and this writer was one of the detail to go with him. At Lamb's Gap Capt. Whaley was making a purchase of a hog for meat from an Indian who spoke but very little of the language. About all I could make out was that the hog was big and fat and wild and that he, the seller, could go to the mountains and kill him, the hog, for the price named. The trade was made and the Indian, mounted on his pony, with his six shooter without the revolving apparatus, set out for the mountain and brought the hog in, and, behold, when the hog was delivered HE was an old woods sow in a very short time of bringing pigs."