That's the Boyd buried in Woodlawn with an SCV marker calling him "colonel" of the 12th Missouri Cav. Not sure what their basis was since he's not listed that way by McGhee or Allardice that I can see. Should have his MSG Lt. Col. rank. The number of known colonels, lt. colonels, and majors at 1st Independence suggests at least two regiments were planned for this Hughes/Thompson/Hays contingent of recruiters. If I'm not mistaken, Hays would have been only at Lt. Col. at the time of the battle, same as Boyd.

Hart came back from East of the Mississippi with Thompson per Battles and Biographies of Missourians quoted on p. 76 of Eakin's Battle of Independence. Makes sense that they would have been in the same command and intending to recruit/or gather recruits from the same area north of the Missouri. I'm not sure if they intended to cross, or await Poindexter's crossing to them from north central Missouri. Foster's 1885 account of Lone Jack claimed that a southern farmer from Lone Jack mistook his force for that of Poindexter who was expected that evening. Poindexter's force had been scattered during roughly the time between 1st Independence and Lone Jack, so this couldn't happen even if this expectation were true.