WHEN Miss Theodosia Huntingdon, of Burlington, Vermont, concluded to come South in 1870, she was moved by three considerations. In the first place, her brother, John Huntingdon, had become a citizen of Georgia—having astonished his acquaintances by marrying a young lady, the male members of whose family had achieved considerable distinction in the Confederate army; in the second place, she was anxious to explore a region which she almost unconsciously p............