set column as index
>>> df = df.set_index('Identifier')
>>> df.head()
Place of Publication Date of Publication
206 London 1879 [1878]
216 London; Virtue & Yorston 1868
218 London 1869
472 London 1851
480 London 1857
Publisher
206 S. Tinsley & Co.
216 Virtue & Co.
218 Bradbury, Evans & Co.
472 James Darling
480 Wertheim & Macintosh
Title Author
206 Walter Forbes. [A novel.] By A. A A. A.
216 All for Greed. [A novel. The dedication signed... A., A. A.
218 Love the Avenger. By the author of “All for Gr... A., A. A.
472 Welsh Sketches, chiefly ecclesiastical, to the... A., E. S.
480 [The World in which I live, and my place in it... A., E. S.
Flickr URL
206 http://www.flickr.com/photos/britishlibrary/ta...
216 http://www.flickr.com/photos/britishlibrary/ta...
218 http://www.flickr.com/photos/britishlibrary/ta...
472 http://www.flickr.com/photos/britishlibrary/ta...
480 http://www.flickr.com/photos/britishlibrary/ta...