Lucy Kroll, an agent for writers, playwrights and performers for more than 50 years, gave the Library of Congress a big gift the other day: 110 boxes full of letters, manuscripts, albums, contracts and other memorabilia.

"This is my gift to my country, so that future artists can learn from the relationships and discipline that I practice with my various clients," she said.Her clients, who she said have ranged "from dancers to jugglers," have included Carl Sandburg, Ben Hecht, William Schuman, Martha Graham, James Earl Jones and Barney Clark, the first person to receive a permanent artificial heart.

Kroll, an octogenarian, sold her New York agency in October but said she is not retiring.