JSTOR
THE SOURCES, ORGANISATION AND USES OF INTELLIGENCE IN THE ANGLO-PORTUGUESE ARMY 1808-1814 (Parts 1 & 2)
John S. Hyden
Journal of the Society for Army Historical Research, Vol. 62, No. 250 (Summer 1984), pp. 92-104 (15 pages)
Journal of the Society for Army Historical Research, Vol. 62, No. 251 (Autumn 1984), pp. 169-175 (7 pages)