Telescopic views like this were produced by many publishers in the mid-19th century, celebrating the progress and ingenuity of the Victorian world both with their content and their form.
They consisted of five or six pieces of card, illustrated with hand-coloured lithographs, connected by strips of cloth. They fold up flat for storage or transport, but when opened out give a three-dimensional effect. (Stereoscopes, which used optics to allow each eye to view a different image to produce a sense of depth, were being developed at about the same time.)
The images might depict events, such as the openings of the Thames Tunnel or the Great Exhibition of 1851 (also published by Lane), or views of general interest, such as St Mark’s Square in Venice or the Exhibition’s ‘Crystal Palace’.
This example depicts central London from the Duke of York’s Column in Carlton Gardens. The column is still there today.