Fenton's photographic campaign in the Crimea and his letters back home For Fenton, undertaking a photographic trip to the Crimea posed a number of practical and logistical problems, especially in 1854 when the physical requirements of the wet collodion process meant that every negative had to be carefully prepared on the spot. Working the process was a complex and painstaking business that required manual dexterity and a comprehensive understanding of photographic chemistry. In common with other photographers of the period Fenton used a mobile darkroom whenever he worked outdoors, and for his expedition to the Crimea he decided to take a carriage that had begun life in the service of a wine merchant. It was a substantial vehicle and by the time he had converted it into his “Photographic Van” it contained everything needed to prepare and process negatives in the field. The sides were given windows of yellow glass fitted with shutters and into the roof he built a pair of cisterns to supply both distilled and ordinary water. At the far there was a bench to hold the baths and trays used to sensitise and develop negatives. Elsewhere, every inch of space was taken up with racks and frames designed to secure the contents of the darkroom in place. There was even a small bed that folded out from under the bench, just like a modern camper van.