-It certainly did not become him to fear Lady Laura on the score of rank, if it was to be allowed to Mr. Kennedy to proceed without fear on that head. (Anthony Trollope )
-He could not believe his father had any such intention; and that if he discovered anything of that kind, it was only when he was in a frenzy, and a melancholy disorder had seized him; and that David had nothing to fear on that head. (Bible)
-I assured him he had nothing to fear on that head (Blackwood's Edinburgh Magazine)
Even Oxford and Random House have not ON THAT HEAD; what does it mean?
Thank you. Joe.