Things take a surprising turn here. Henry and Wilson (the previously-loud-and-now-newly etc.) are marching along. Henry suddenly remembers that he has that packet of letters Wilson wanted him to give his family if he died.
This makes Henry feels vastly superior to Wilson.
In fact, to quote Crane, Henry (unlike Wilson), "had performed his mistakes in the dark, so he was still a man" (15.13). (Scary, scary philosophy; although so true if you think about it. Everybody’s all fine and good until the indictments are handed down and the paparazzi are there to make it real.)
Henry’s ego inflates to the size of his head (which we’ve determined for you is still the size of a "youth"-sized basketball).
Coincidentally (or not so much so, if you consider the fact that a writer is writing all this), right at this very moment, Wilson BLUSHES big time and says that Henry can give him the letters back.
Henry does, and without acting like too much of a thunder-bag, either.
This makes Henry regard himself as "an individual of extraordinary virtues," also known as Self-Image #467 so far.