Charles Harding Firth, Dictionary of National Biography… (1912)
“ Gardiner succeeded in stating fairly and sympathetically the position and the aims of both parties. He did not confine himself to relating facts, but traced the growth of the religious and constitutional ideas which underlay the conflict. No side of the national life was neglected. He won the praise of experts by his accounts of military and naval operations, elucidated continually the economic and social history of the time, and was the first to show the interaction of English and continental politics. ”
