* Haynes, Alan ( 1992 ): Invisible Power: The Elizabethan Secret Services 1570 – 1603 Alan Sutton ISBN 0-7509-0037-7
* Haynes, Alan ( 1992 ): Invisible Power: The Elizabethan Secret Services 1570 – 1603 Alan Sutton ISBN 0-7509-0037-7
0.004 seconds.
* Haynes, Alan ( 1992 ): Invisible Power: The Elizabethan Secret Services 1570 – 1603 Alan Sutton ISBN 0-7509-0037-7
* Haynes, Alan ( 1992 ): Invisible Power: The Elizabethan Secret Services 1570 – 1603 Alan Sutton ISBN 0-7509-0037-7
0.004 seconds.