Medieval espionage...

de bene esse: literally, of well-being, morally acceptable but subject to future validation or exception

http://www.medievalists.net/2011/01/11/espionage-and-intelligence-from-the-wars-of-the-roses-to-the-reformation/

Espionage and Intelligence from the Wars of the Roses to the Reformation - Medievalists.net

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Espionage and Intelligence from the Wars of the Roses to the Reformation By Ian Arthurson Nottingham Medieval Studies, Vol.35 (1991) Introduction: In the period between the Wars of the...