Later panorama souvenir keys were printed in a strip format and visitors could use them to identify sights. This is a key to Robert Burford’s panoramic painting of Bombay (now Mumbai), exhibited at the Panorama of Leicester Square in 1831. At that time Bombay was a major trading port of the British East India Company. 

Both Robert Burford and his father John had previously worked for the inventor of the panorama, Robert Barker, and later for his son, Henry Aston Barker. Robert Burford took over as proprietor of the Panorama at Leicester Square after Henry Aston’s retirement in 1824. Burford produced many of the drawings and the paintings for his panoramas. However, and as Ralph Hyde has noted, for panoramas of more distant places such as Mumbai, he would rely on the drawings provided by amateur artists, who were often ‘resident military officers and government officials’.