By the end of the 19th century, more administrative records from the period had become available to historians such as William Stubbs, Thomas Tout, and J. C. Davies, who focused on the development of the English constitutional and governmental system during his reign. Although critical of what they regarded as Edward II's inadequacies as a king, they also emphasised the growth of the role of parliament and the reduction in personal royal authority under Edward, which they perceived as positive developments. During the 1970s the historiography of Edward's reign shifted away from this model, supported by the further publishing of records from the period in the last quarter of the 20th century. The work of Jeffrey Denton, Jeffrey Hamilton, John Maddicott, and Seymour Phillips re-focused attention on the role of the individual leaders in the conflicts. With the exceptions of Hilda Johnstone's work on Edward's early years and Natalie Fryde's study of Edward's final years, the focus of the major historical studies for several years was on the leading magnates rather than Edward himself, until substantial biographies of the king were published by Roy Haines and Seymour Phillips in 2003 and 2011.