When Prince Harry attended meetings in New York City Thursday with his wife, Duchess Meghan, eagle-eyed observers noticed a very sweet detail on his briefcase.
Harry, 37, carried a briefcase monogrammed with the words "Archie's Papa," a reference to the 2-year-old son, Archie, he shares with Meghan.
The Sussexes are also the new parents of a daughter, Lilibet, nicknamed Lili, who was born in June.
The Sussexes' trip to New York City marked the first time the California-based couple has made an in-person public appearance together since Lili's birth.
MORE: Prince Harry and Meghan Markle featured in TIME100 Most Influential People issueThey spent Friday at a public school in Harlem, where Meghan read her children's book "The Bench," to students.
The Sussexes visited a mural painted by students and donated garden boxes with vegetables and herbs to reinforce the need for healthy food.
On Thursday, the couple joined local and state officials for a tour of One World Observatory at the rebuilt World Trade Center complex and visited the National September 11 Memorial & Museum.
They later held a private meeting with the U.S. ambassador to the United Nations and participated in a World Health Organization (WHO) roundtable on COVID-19 vaccine equity.
On Saturday, Harry and Meghan are scheduled to promote COVID-19 vaccine equity again when they take part in Global Citizen Live, an annual concert event held on the Great Lawn in Central Park.
Watch the Global Citizen Live concert on ABC News Live on Saturday, Sept. 25, starting at 1 p.m. ET.