Abram B. Olin

[Linda Anderson]

According to The Evidence, “The Union League of Philadelphia published Tanner’s verbatim notes in a facsimile edition titled While Lincoln Lay Dying: A Facsimile Reproduction of the First Testimony taken in Connection with the Assassination of Abraham Lincoln as Recorded by Corporal James Tanner..." You can find the book, which includes transcriptions, in the Internet Archive at https://archive.org/

Judge David Kellogg Cartter, chief justice of the Supreme Court of the District of Columbia, Judge Olin and attorney B.A. Hill interrogated six witnesses as Lincoln lay dying. Hill's name is included in the interrogation of the first witness, Alfred Cloughly, but the interrogators of the other five witnesses are not specifically mentioned in Tanner’s notes although they were most likely all present.

As Dave pointed out, Olin's interviews with other witnesses including Henry Rathbone are included in The Evidence.