Agatha Christie “Annotated The Mysterious Affairs at Styles with English Grammar Exercises: by Agatha Christie (Author), Robert Powell (Editor)”, Powell Publications, LLC
John Owen (1815). “Meditations and Discourses on the Glory of Christ: In Two Parts. I. In His Person, Office, and Grace; with the Differences Between Faith and Sight: Applied Unto the Use of Them that Believe. II. The Application of the Same Meditations Unto Unconverted Sinners, and Saints Under Spiritual Decays”, p.3