Some writers may have to struggle with a lack of source material, but the principal source of this book – the business archive of Jean Desmet – is a wall of written paper. The keyhole metaphor is entirely appropriate, although there are, properly speaking, many keyholes. I looked in on Desmet himself, but also on his customers, suppliers and competitors. Hundreds of different stories, sometimes contradicting each other, yet all revealing the complexity of (film) history. In a Pathé farce called UN COUP D’OEIL PAR ÉTAGE (1904), a concierge peeps through the keyholes on each floor of his building and discovers a fire on the top floor. We come upon signs of damage by fire and water in Desmet's business archive as well. In 1938, a fire broke out at the top of the Cinema Parisien, his cinema in Amsterdam. Both Desmet's films and his business records were very nearly lost, and this book would never have been written.

My book is a condensed and reworked version of a dissertation, originally written in Dutch, which was awarded a doctorate by the University of Amsterdam in March 2000. The original idea of the study goes back to the end of the 1980s. In 1988 Nelly Voorhuis and I were organising a festival of Italian cinema before 1945 entitled ‘Il primo cinema italiano 1905-1945’, which marked my introduction to early Italian film, to the Giornate del Cinema Muto at Pordenone, Italy, and to the international community of film historians. I became fascinated by the ‘mainstream cinema’ of the decade 1910-1920. It was only then that I became properly acquainted with the Desmet Collection, and we selected several of Desmet's Italian films for the festival programme. Together with the film historian and festival programmer Paolo Cherchi Usai, I looked at unrestored Desmet films at the Netherlands Filmmuseum's auxiliary branch in Overveen. It was the first time I had seen nitrate films, with their bright monochrome tinting, or caught the stale odour of decomposing nitrate stock.