I recently picked up a few of the 'drawings packs' series from Bovington, concentrating on late war period British armoured and scout cars. Bit of a mixture as regards contents, but has helped me understand their capabilities and weapons/ammunition load better. A few included a single page headed 'abridged specifications', which included vital statistics on armour, dimensions and so on. There wasn't one included for the Humber MkIV unfortunately. I did pick up the Service Instruction book for the vehicle from MLRS a while ago, which provides a lot of that data, but does not cover armour thickness. I wondered in anyone has seen the 'abridged specifications' sheet for the Humber MkIV, or the MkIII, which wasn't on my list but presumably is very close to the MkIV in most respects. Thanks, Gary