Salomon-Auguste Andree (centre) (1854-1897), Swedish engineer, with the men who accompanied on the fatal voyage to explore the North Pole (1897).  On 11 July 1897 they set out by balloon.  A carrier pigeon message received a few days later was the last trace of the expedition until their remains were found 33 years later east of Spitsbergen.  From 'La Navigation Aerienne' by  J Lecornu (Paris, 1910).
{}