Once referred to as "Happiness" correspondence, these notes reflect O'Neill's more personal, non-issue oriented relationship with his constituents, friends, and colleagues. Length and topics vary considerably, from brief congratulatory notes on job appointments, wedding anniversaries, and birthdays to comments on how government works in answer to inquiries from children. Although some of the briefer replies follow a formulaic pattern, it was not unusual for O'Neill to dictate letters to his personal secretary, Eleanor Kelley. Similar correspondence may be found in Eleanor Kelley's files (Series II. Subseries B.).