The archives of any Paper.li can be found at the top of a Paper.li where the paper edition date is displayed. Click on the paper edition date and a calendar with past dates will appear. You will know that an archive exists when the date is bold. Click on the date you would like to see and the front page of that Daily will appear.
For papers that publish twice daily, both editions are saved, but only the last edition of the day is accessible using the archives link. Publishers can not edit archived editions.