Thanks for the reply. I suppose I should plow through the documents before asking specific questions. I am eager to learn abouut the limits of horses after reading some accounts of Stoneman's raid in support(?)of Hooker's campaign leading to Chancellorsville. The reports of the countryside being littered with the corpses of horses does not say much for planning and care for the basic mode of transportation. I have recently visited the cavalry museum at Fort Riley, Kansas and I have a photograph of a monument there dedicated to the loss of a million+ horses and mules during the Civil War. Seems to me there was a lot of acceptable "wastage" of animals (to use a World War I term).