A synopsis of Mrs. Lydia Bacon's story was found at the Central Michigan Library's Clarke Library's website (see excerpt below with added link):
Lydia Bacon (1786-1853) accompanied her husband, Josiah, a quartermaster, to his military assignment. She waited at Vincennes...for him to return from the Tippecanoe campaign along the Wabash, then left on horseback to go with her husband's regiment to Detroit.
From The Detroit News:
"Mrs. Bacon carried in a bag on the pommel of her saddle a Bible, a copy of Homer's "Iliad," and a "huge Spunge cake." She wrote letters to her 15-year-old sister Abby, her mother and friends in Boston, which later she collected as a memoir of her experiences during the War of 1812."