Traditionally the impetus and planning for the entire work has been ascribed to Thomas Sackville. As he was only eighteen years old at the time of the first edition this seems unlikely, and he is listed as a contributor only in the third edition of 1563. The reason for Sackville receiving much of the credit for the work is in part that he was the most famous of the writers to work on the "Mirror" but also because his contributions, "Induction" and "The Complaint of Henry Duke of Buckingham", are often the only ones regarded as having any lasting literary merit. Another reason for the ascription to Sackville is due to the reorganisations the work underwent in later editions, giving accidental prominence to Sackville's sections and confusing later readers.