- Three Celtic Earldoms: Atholl, Strathearn, Menteith
- The Ruthven Family Papers: The Ruthven Version of The Conspiracy and Assassination at Gowrie House, Perth, 5th August 1600
- The Lord Chancellors of Scotland, from the Institution of the Office to the Treaty of Union
- The Ruthven family papers: the Ruthven version of the conspiracy and assassination at Gowrie house, Perth, 5th August 1600
- Mary Queen of Scots and Who Wrote the Casket Letters?, Volume 2