Final answer:
The specific feelings of Barrington Irving regarding his solo flight are not provided, but by looking at similar historical aviation feats, one can assume a profound sense of accomplishment and pride similar to what Lindbergh experienced.
Step-by-step explanation:
Barrington Irving's feelings about accomplishing his solo flight around the world are not explicitly detailed in the provided information. However, by drawing comparisons with the experiences and emotions of other aviators such as Charles Lindbergh and the emotional expressions of other historical figures, we can infer that accomplishing such a feat would likely have invoked a deep sense of achievement, pride, and fulfillment, akin to overcoming immense odds or achieving a long-sought dream. For instance, Lindbergh's solo flight made him an international hero, and he was met with a ticker-tape parade, which was a triumph of individualism. These examples illustrate the potential feelings of euphoria and a sense of accomplishment that come from pushing the boundaries of aviation and achieving what once seemed impossible.