I was specifying how Traveller has described Nobility in the Imperium through various editions and highlighting the fact that the model is NOT based on Medieval Nobility, but rather is loosely based post-Renaissance aristocracy (i.e. "Age of Sail") combined with elements of the Late Roman Empire ("Dux", "Comes", etc.). The Imperium is NOT Europe, and certainly not Medieval Europe.
Does this matter? It is Europe, but not that Europe? Is it Italian vs French or Russian vs Spanish. I would be excited to read those Patents and Charter, but I am not aware of many that are published. British peerage is referenced most because it is documented best due to the many legal maneuvers of past century and a half.
None of this even went down the garden path to Principalities. Monaco is lovely, btw.
Further, Page 34, Library Data, "All nobility is part of the
feudal system of Imperial government. Nobles, upon receiving their patent or upon confirming their inheritance when coming of age, swear continuing loyalty to the Imperium, to the Emperor, and to the Emperor's successors."
Page 36, Library Data, " Fiefs are granted in a Letter of Enfeoffment separate from the patent of nobility. Fiefs are granted to the individual at the discretion of the Emperor and remain the Emperor's possessions. However, the fief conveys the right to use the land, to rent or lease it out and collect income from it. The fief is a convenient method for the Emperor to reward certain nobles. " The full name of Charter is "Charter of Enfeoffment . The fundamental difference being the Charter is more elaborate, more detailed, a document written in formally legal way. The Letter vs the Charter, the first states who operates (the Emperor owns) the second details how something is operated.