The two photographs relating to the Leonine Walls are taken from the same vantage point, operating a slight rotation of the camera. The juxtaposition of them makes it possible to create a panorama without any caesura, a sign of the great technical skill of the photographer capable of achieving such a result through a calibrated rotation of the camera. Indeed, the two calotypes appear side by side in both Piero Becchetti's collection and Cheney's Album. Electronic processing proved extremely useful, allowing a similar result to be obtained without any need to intervene on the originals, in this case the two photographs owned by the BSMC.

A similar digital operation performed on the two calotypes presenting a panorama taken outside Porta San Pancrazio confirmed the existence of a gap between the two images. They are in fact very close but not superimposable nor perfectly contiguous. A "digital intervention" along their edges softens the caesura between the two images and provides an indication of what was plausibly the effect sought by the photographer, without however falsifying the existing.

(Mario Bottoni)