A Unique Encyclopedia of Astronautics in Two Books . The name of Kenneth Gatland stands out because it was like Clarke he went on to become President of the BIS and a recognized authority on spaceflight. At the time of the 1944 Eastercon he had already begun on his career:"In 1941 K W Gatland & H N Pantlin formed the Astronomical Development. Society. This was an outgrowth of the Hawker Model Flying Club, and the two founder-members worked at that time as junior draughtsmen at Hawker. Aircraft in Kingston-upon-Thames. Soon, Gatland and Pantlin ... had built small rocket test stand and for the next two years developed tinysolid-propellant motors for model aircraft and developed a led motorwhich used fueled air to supply the exhaust gases. "- from 'THE ROCKET - the history and development of rocket & missile technology' by David Baker, 1978.