Research notes written by Mahan and found in Lives of the British Admirals," volume 1, by John Campbell, a volume in NWC's rare book collection. Bookplate in the book indcates that the copy belonged to Mahan.

Notes written by Mahan found in John Campbell's Lives of British Admirals, vol.2., held in NWC's rare book collection. The notes relate to the early 17th century with reference to Sir Julian Corbett's work. Also includes a fragment of a note on an "expedient" way "to begin text book."