There are a lot of untold stories concerning the Barras. here is one that I know of.

Some years back, mid-80s I think, there were some photographs published in a classic motorcycle magazine of the 1939 TT.
The photos came from a roll of B&W Agfa film that had been found still in a pre-war Leica camera a collector had bought off one of the Glesga Barras.
The conjecture was that the unknown owner of the camera had been in the TA and was called up when the TA was mobilised shortly after that years TT races and had been one of the early casualties of the war. The camera being kept by his parents until they, in turn died and ended up on the barras as part of a house clearance.