His son was created hereditary usher and this
office was later confirmed upon the Barony of Langton by King James IV.
This office was later usurped by John, Earl
of Wigtown. A committee of Parliament had been appointed to resolve the matter but
Cockburn was not ready to wait that long. He instead protested his right when the King
entered Parliament and for his effort the King sent the protesting usher to Edinburgh
castle as a prisoner.