Representative John Lewis was looking for an orange to carry in his bag. He wanted to pack two books, a toothbrush, toothpaste, an apple and an orange inside his backpack, just like he did in 1965, when he led a vanguard of close to 600 people across the Edmund Pettus Bridge.
Mr. Lewis had already acquired a jacket and backpack that were similar to the ones he wore half a century earlier on the march from Selma to Montgomery, Ala., though it took him months and trips to several thrift shops to find them. The orange was the only missing piece to complete his costume of himself at the 2015 Comic-Con International in San Diego, an aide, Andrew Aydin, 36, recalled.
“He went full re-creation,” Mr. Aydin, who was Mr. Lewis’s policy adviser and digital director, said in an interview.
Photos of Mr. Lewis walking across the convention center, cosplaying as his younger self — with the same determined expression he sported in Selma when he was 25 — began to circulate on social media after the congressman died on Friday. “John Lewis was a giant and a moral compass,” said Senator Elizabeth Warren, one of tens of thousands of people to share a tweet of the images from that day.
Mr. Lewis was at Comic-Con that day to promote “March,” a three-part graphic novel memoir he wrote with Mr. Aydin and the artist Nate Powell. The second book in the trilogy had been released a few months earlier, and Mr. Lewis was in San Diego to promote it. He would return again in 2016 and 2017, and recreated the march both times.
His goal that day in 2015 was to help the children understand that you don’t need super powers to be a hero, Mr. Aydin said.
“He was trying to show them how his faith and his belief in America fundamentally put him in a position where they would look at him as a hero,” Mr. Aydin said.
The congressman said that it was “another children’s march, just like they called it in Alabama,” Mr. Aydin said.
Mr. Lewis walked the half-mile distance from a panel room to his booth hand-in-hand with the children, and others joined in as he walked by. By the time Mr. Lewis took notice, there were close to 1,000 people following him, Mr. Aydin said.
“‘This is almost too much,’” Mr. Aydin remembered Mr. Lewis saying. “It’s his way of saying this is something really extraordinary.”
In a 2015 interview with CBS News, Mr. Lewis called the moment “unreal.”
“I walked with little children, wonderful little children. We marched onto the floor of the convention center. And it was unreal, unbelievable. And this throng of people just walkin’ with us,” he said.
The children were third-graders from Oak Park Elementary in San Diego, and they were learning about the civil rights movement from Mr. Lewis’s book. Their teacher, Mick Rabin, an avid comic book fan, used it to teach his students about other figures from the movement. But at Comic-Con, the students only had eyes for the congressman, even as people dressed up as Spider-Man and Wonder Woman walked by, Mr. Rabin said.
“The kids went bonkers,” Mr. Rabin said. “They knew who he was because they had read it in the comic, and he was wearing the same thing.”
The idea for the book had started nearly a decade earlier, in 2008. When Mr. Aydin, a lifelong comic book fan, admitted to the office staff that he was going to Comic-Con after working arduous hours during Mr. Lewis’s re-election campaign, his colleagues laughed — but not Mr. Lewis.
“‘Don’t laugh,’” Mr. Aydin recalled him saying to the staff, before reminding them of a 1957 comic book that was popular in the civil rights movement, “Martin Luther King and The Montgomery Story.”
That conversation eventually led to the “March” trilogy.
“We would stay up and I would interview him,” Mr. Aydin said about their writing process. “I’d ask him questions and he’d fall asleep.”
The first of the series, “March: Book One,” published in 2013, became a New York Times best seller. Mr. Lewis cried when he learned that, Mr. Aydin said. The second, in 2015, won an Eisner Award at Comic-Con, and the third, published in 2016, won the National Book Award for young people’s literature.
In a 2013 appearance on “The Colbert Report,” Mr. Lewis talked about how inspired he was by Martin Luther King’s comic book.
“I read it and I reread it, and this book inspired me,” Mr. Lewis said. “He became my hero, my inspiration, my leader. He inspired me to say no to segregation and racial discrimination.”
Mr. Rabin said Mr. Lewis had a similar effect on his students in 2015.
“My students who walked with him that day were transformed forever,” Mr. Rabin said. “They were truly utterly transfixed by that interaction.”