Images of nearly 6,000 Baltimoreans are the life's work of a photographer who documented racial segregation and early civil rights protests, and also captured candid moments of now-anonymous brides, classmates, football players and black residents of the city.

But while Paul S. Henderson left what Maryland Historical Society curator Jennifer Ferretti calls an "unparalleled visual record of civil rights in Baltimore," he didn't leave behind captions.

The names of his subjects aren't known, as Henderson didn't keep written files — or they didn't survive. Ferretti says it is time, a half-century later, to put names to the unidentified faces in the photographic negatives taken by Henderson, a black Baltimore commercial and news photographer active from about 1929 to 1960. And she's enlisting the public's help.

The Henderson collection, donated for preservation by Henderson's widow decades ago, is the focus of an exhibition at the Maryland Historical Society that is designed to resurrect his life's work from obscurity.

Ferretti suspects that many of the people depicted in the photographs developed from Henderson's negatives are the parents and grandparents of Baltimore residents today. He shot numerous weddings, but also funerals, church socials and college events.

"I am definitively obsessed with Henderson's work," said Ferretti, the historical society's photography curator. "I would love to get the public involved to identify the people in these pictures."

Henderson's acetate negatives had been kept organized in little gray archival boxes at the historical society in Baltimore. They have been a fertile historical trove — for those who knew how to find them. Maryland law professor Larry Gibson, who is completing a biography of Supreme Court Justice Thurgood Marshall, has referenced them for his research.

'It's a rich collection," Gibson said. "There's a lot there, and I've spent time identifying several hundred."

While the civil rights movement is usually associated with the 1960s, Ferretti said, it arrived earlier in Baltimore and Henderson was there with a camera.

Some photographs are of such well-known local figures as Dr. Lillie May Carroll Jackson, who helped launch the civil rights movement here and reorganized the Baltimore branch of the National Association for the Advancement of Colored People. Other photos show prominent figures of the national civil rights movement — Marshall, Gov. Theodore R. McKeldin, activist and NAACP lobbyist Clarence M. Mitchell Jr., and Afro-American publisher Carl Murphy.

But there was another side to his work, that of someone who recorded everyday life in black Baltimore. He shot the art deco facade of the Charm Center, a women's dress shop at 1811 Pennsylvania Ave. owned by Little Willie Adams and his wife, Victorine. In segregated Baltimore, black women could buy their wedding gowns at this shop; they were not allowed to shop or try on garments at the Howard Street department stores in the 1940s.

Henderson also photographed entertainers, including Pearl Bailey, in a theater dressing room. Ferretti is uncertain where the photo was taken, another detail that went unrecorded.

Paul Samuel Henderson was born in 1899 in Springfield, Tenn., according to Ferretti, and "came from a relatively affluent black family." He also lived in Nashville; Gary, Ind.; and Richmond, Va., where he took photographs for the Afro-American paper there.

In 1929, Henderson moved to Baltimore and married Elizabeth Johnson, a grade-school teacher who preserved the collection after his death in 1966. The couple lived on Bloom Street, later on McCulloh Street and finally on Druid Hill Avenue.

Henderson worked as a staff photographer and occasional writer for the Afro-American newspaper in Baltimore, operated a photography business and belonged to Baltimore social organizations, Ferretti said.

According to articles in the Afro-American, Henderson helped cover Maryland's last lynching, in 1933 in Princess Anne.

Many of his photos depict Pennsylvania Avenue, once the hub of black culture and life in Baltimore. And many of his subjects are stylishly dressed. In scenes along the avenue, men are wearing Chesterfield-collar coats and women wool dress coats.

"He lived within walking distance of Pennsylvania Avenue," Ferretti said. "And that proximity is reflected in his work. Along with education, church, sports, the NAACP and politics, that street is one of the major subjects of his photographs."

Henderson wrote a letter to his editors at the Afro in 1946, stating that he was retiring for health reasons. In April 1966, Bettye Moss, an Afro columnist, noted in her paper that he was recuperating from an illness at the Bolton Hill Nursing Home. He died later that year.

Nine thick binders contain prints of the photos he took. Ferretti said she hopes people will visit the exhibit and leaf through them.