Or unless you read a particular copy of "Crown Imperial" about 1984 - from an article by Andrew Chaney, a sketch of the FID shoulder title, locally made, in brass. Also worn on the slouch hat I would think? The original was on display at the INt Corps museum at Ashford, Kent - I don't know where the museum is nowadays. Field Intelligence deal with int. on the enemies organistaion, capabilities, tactics & intentions & with the geography of the battlefield & with counter intelligence to protect own personnel, information & equipmentd. Intelligence units were viewed as war raised rather than permanent requirements prior to WWII (when the Int. Corps was established in 1940), but the Anglo-Boer War showed the British that there was a need for such a corps. The FID was established to provide operational intelligence, Natal being at the forefront of such activity, units such as the Natal Corps of Guides (comprised of local white farmers & black guides) provided intelligence for the FID, which grouped guides, interpretors, scouts & native scouts into fixed grades & introduced field security & intelligence gathering procedures such as censorship, POW interrogation, field sketching, Ballon recce reports, carrier pigeons,etc. The British had sent over a small number of British officers including a Major Rimmington who formed the Rimmington Scouts who were often referred to as the "Intelligence Corps". Although the informal Int. Corps units were'nt authorised insignia, various scout units produced their own slouch hat & shoulder insignia. Medals to personnel of these units were inscribed "FID".