And you, most noble Duke!

A monarch with such a low title was still regarded as more important than a noble Duke.

It is the noble Duke of Gloucester.

The noble Duke hath been too much abused.

I am, in this, commanded to deliver The noble Duke of Clarence to your hands.

I do beseech your Grace to pardon me, and withal Forbear your conference with the noble Duke.

Who is most inward with the noble Duke?

Sounds fishy to me, too... not that I can't understand why the noble Duke would want to take off for a while, though.

The noble Duke my master, My worthy arch and patron, comes to-night.

You are definitely not a degenerate, noble Duke.