sentences:  Owing to himself claiming that Preston had flown an unpowered aircraft that year in "Aeronautics" magazine two years earlier and in the later letter to Gibbs-Smith, one wonders whether James was aware of the discrepancies in his own testimonies, as one by one his claims were disproved.What makes the assertion that Preston Watson built a glider, or any aircraft in 1903 questionable is that James Watson publicly contradicts himself on more than one occasion.Only after being pressured by Gibbs-Smith after first making his claims in 1953 did James Watson admit that the aircraft Preston flew in 1903 was a glider.