quality:correction
March 21, 1910

On Monday morning, 21 March 1910, some 30 spectators witnessed Houdini make an extended flight at Diggers Rest of 7min. 37secs., covering at least 6 miles, at altitudes ranging from 20 ft. to 100 ft. Australian aviator Basil Watson's father, mother, and younger sister, Venora, were among the spectators; and their names were included in the list of 16 spectator signatures on the certificate that verified Houdini's achievement.