A theory about the swords shown in the Angelo lessons poster, and Roworth manual. Check out this sword that was sold last year, attributed to the London and Westminster volunteers (who Roworth and Angelo are most certainly linked)
Notice that both the Angelo poster and first edition Roworth show what looks like a fairly short, straight, simple stirrup hilted sword, and also that on the Angelo lessons poster most of the troops are carrying carbines. Now go back to the sword I linked to. 30.5" blade, straight and stirrup hilted sword bayonet to be used with a carbine, and attributed to the same Volunteer unit.
Clearly the system is intended for all swords when on foot, but is this the sword (sword bayonet) that is being displayed? Lastly, if it is, are they referring to it as a broadsword? Which would be logical.
–Nick Thomas, Academy of Historical Fencing