I think that first link you posted must be an earlier version or volume of the same book. It is very similar -- there is a section on skirmishing and a section on how to load and fire a pistol while mounted -- mine has those sections, but the page numbers don't match and mine has a special section on the Colt pistol, so probably mine is a later version or volume of the same book. On the spine of mine, it shows a title "Cavalry Tactics, Vol. 2".