1787973 Poplar Recreation Ground: crowds watch a hot air balloon, 1892 (b/w photo) by English Photographer, (19th century); London Metropolitan Archives, City of London; (add.info.: Poplar Recreation Ground: crowds watch a hot air balloon. Large flags are hung in celebration of the occasionand children can be seen climbing upon the railing to recieve a better veiw of the event. Poplar, Metropolitan Borough of; Tower Hamlets, London Borough of); 穢 London Metropolitan Archives ; English, out of copyright.