A Harvard Law School (HLS) professor admitted that six paragraphs in his newest book came almost verbatim from another professor’s work, in a mistake he attributes to two assistants.

Climenko Professor of Law Charles J. Ogletree Jr. apologized for what he calls “serious errors” in his book All Deliberate Speed in a Sept. 3 statement, following an investigation by former Harvard President Derek C. Bok and former HLS Dean Robert C. Clark.

Clark and Bok reported their findings that the passage was lifted from Yale Professor Jack M. Balkin’s 2001 collection of essays, What Brown v. Board of Education Should Have Said, to HLS Dean Elena Kagan. Based on their report, Kagan called the matter “a serious scholarly transgression,” HLS communications director Michael A. Armini wrote in an e-mail. He added that she declined to comment further.

Ogletree said in a phone interview last week that he will be disciplined, but would not say how. Armini wrote that it is school policy not to comment on disciplinary action.

Bok told the Boston Globe last Thursday that the use of Balkin’s material appeared to be an accident, partially caused by publisher W.W. Norton’s insistence on a “very tight deadline.”

“There was no deliberate wrongdoing at all,” Bok said. “He marshaled his assistants and parceled out the work and in the process some quotation marks got lost.”

Bok did not respond to repeated requests for comment.

Ogletree accepts “full responsibility” for the errors, he said in his statement, which was posted on the HLS website.

“I made a serious mistake during the editorial process of completing this book, and delegated too much responsibility to others during the final editing process,” he said. “I was negligent in not overseeing more carefully the final product that carries my name.”

Ogletree said in the interview that he first learned of the issue when Balkin, tipped off by an anonymous letter, called him. Kagan also received an anonymous letter reporting the issue, Ogletree said.

But Ogletree told The Crimson that he had not read the passage of Balkin’s book that appears in his own work. An assistant inserted the material into a manuscript and intended for another assistant to summarize the passage, according to Ogletree’s statement. The first assistant inadvertently dropped the end quote, and the second assistant accidentally deleted the attribution to Balkin before sending a draft to the publisher.

When the draft returned, Ogletree did not realize that it was not his material, he said in the statement.

But Ogletree said he was closely involved in most of the drafting of the book due to its personal nature.

“The story substantially relies on my own personal perspectives and observations, and how Brown has influenced my life,” he said.

Russell Capone, an HLS student who assisted Ogletree with the book, said that he was not involved with the passage under scrutiny.