A letter to his most Excellent Majesty, George the third, King of Great-Britain, France, and Ireland, and Emperor of North America. - Start with your name, address, and contact details at the top. 2.(a date from when the act took place!) What is your name? This is a compilation of openings and closings from medieval manuscripts to assist you in your letterwriting. Written at Eskalya on the Friday next before Lady Day, in the first year of the reign of. Miles, King of the West. These guidelines will help you to write the date correctly in a business letter. Format. The date is generally written in full in a business letter. Students use a variety of sources and resources to write a letter to King George III of England from the perspective of a Loyalist (supporting King George) The date is generally written in full in a business letter.