This is a scan of a tiny print - not much bigger than an oversize postage stamp - which cannot be blamed for getting lost, falling down the back of a drawer, or whatever. It was so faded, the subject was completely indistinguishable from the background sepia blur. But scanned and repaired, fixed and tweaked - London in the 1920s emerges like it is emerging from a thick London fog. You can just make out Tower Bridge in the distance and that is the bulk of Cannon Street Station in the foreground. The photograph must have been taken from the top of St Paul's Cathedral.