Owain Glyndŵr, or Owain Glyn Dŵr, was a Welsh ruler and the last native Welshman to hold the title Prince of Wales. He instigated a fierce and long-running but ultimately unsuccessful revolt against the English rule of Wales... (wikipedia)
Most redoubted lord and right sovereign cousin, may the Almighty Lord have you in his keeping.
Dread lord and cousin, may the almighty preserve your reverence and lordship in long life and good fortune.
And in that I cannot send unto you all my businesses in writing, I despatch these present bearers fully informed in all things, to whom it may please you to give faith and credence in what they shall say unto you by word of mouth.