This is the evidence you need but I cannot help you with the discussion much. Better check what the guys at prime Writings can do in your case.
Since Britain first at Heaven's command
Arose from out the Azure Main,
Did ever o'er this jarring Land
A monarch with more firmness reign?
Then to the Natal Day we sing,
Of George our sacred friend and King
-from a song by American loyalist in honor of George III's birthday in 1777