The photographs are obviously made for the tourist market. Most of the sheets are embossed with the attribution, Naya fotografo Venezia and captions describing the image are printed on the back of the sheets in English, French and German.
The librarian kindly let me photograph the images...I only had my Iphone with me, and I didn't want to use the flash on works on paper, but the resulting photographs are legible. I have spent an absorbing Sunday afternoon studying the images.
Here is a view of the Rialto bridge, together with two more detailed close ups of the photograph. On the reverse of the photograph, there is a handwritten inscription.
Carlo Naya was born near Turin in 1816, and studied law at the University of Pisa. He worked as a professional daguerreotypist, operating in Prague in 1845 and then opening a studio in Constantinople in 1846. In 1857, he returned to Italy, moving to Venice to work with established publisher Carlo Ponti, who distributed his prints. The two men quarreled, and Naya opened his own studio. In 1886, he purchased a larger premises in Piazza San Marco. When he died in 1882, his wife continued to run the business, which eventually closed in 1918, when publisher Osvaldo Böhm bought most of Naya's archive.