The Meagher wet plate sliding-box camera is a 19th-century large-format wooden field camera built for the wet collodion process, in which a glass plate was sensitised, exposed and developed while still wet. Sliding-box construction — an inner box that slides within an outer one to focus — was the standard design for plate cameras of this period, and Meagher of London was among the British makers supplying professional photographers with such instruments.

Sales evidence for this Meagher is thin: a single recorded UK auction hammer result of £2,800 from December 2009, which sets the only firm reference point for what one of these has sold for at saleroom level. With just one data point, the market value in 2026 is best treated as indicative rather than a reliable range, and condition, completeness of the original plate holders, and the presence of a period lens will heavily influence what any given example is worth today.