Part of Whitman's role at the Attorney General's office was interviewing former Confederate soldiers for Presidential pardons. "There are real characters among them", he later wrote, "and you know I have a fancy for anything out of the ordinary." In August 1866, he took a month off to prepare a new edition of "Leaves of Grass" which would not be published until 1867 after difficulty in finding a publisher. He hoped it would be its last edition. In February 1868, "Poems of Walt Whitman" was published in England thanks to the influence of William Michael Rossetti, with minor changes that Whitman reluctantly approved. The edition became popular in England, especially with endorsements from the highly respected writer Anne Gilchrist. Another edition of "Leaves of Grass" was issued in 1871, the same year it was mistakenly reported that its author died in a railroad accident. As Whitman's international fame increased, he remained at the attorney general's office until January 1872. He spent much of 1872 caring for his mother, who was now nearly eighty and struggling with arthritis. He also traveled and was invited to Dartmouth College to give the commencement address on June 26, 1872.