Whitman on moral grounds after finding an 1860 edition of Leaves of Grass. O'Connor protested until J. Hubley Ashton had Whitman transferred to the Attorney General's office on July 1. O'Connor, though, was still upset and vindicated Whitman by publishing a biased and exaggerated biographical study, The Good Gray Poet, in January 1866. The fifty-cent pamphlet defended Whitman as a wholesome patriot, established the poet's nickname and increased his popularity. Also aiding in his popularity was the publication of "O Captain! My Captain!", a relatively conventional poem on the death of Abraham Lincoln, the only poem to appear in anthologies during Whitman's lifetime. 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 In August 1866, he took a month off to prepare a new edition of Leaves of Grass which would not be published until 1867 after difficulty in finding a publisher.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. Health decline and death After suffering a paralytic stroke in early 1873, Whitman was induced to move from Washington to the home of his brother—George Washington Whitman, an engineer—at 431 Stevens Street in Camden, New Jersey. His mother, having fallen ill, was also there and died that same year in May. Both events were difficult for Whitman and left him depressed. He remained at his brother's home until buying his own in 1884. However, before purchasing his home, he spent the greatest period of his residence in Camden at his brother's home on Stevens Street. While in residence there he was very