Brisure

The baton is made now very short by the French, who call it baton peri, and is always a brisure, frequently made use of by the younger sons of France, of which I have treated in my marks of cadency, and shall do so again[…]

But the bar (being a horizontal piece, a diminutive of the Fess), is not used like the French barre as a brisure for illegitimacy; a bar-sinister is an absurdity and impossibility.