sentences:  By contrast, James' and others' testimonies to the dubious claims of Preston's powered-flight-before-the-Wrights are riddled with inconsistencies, changes of facts and general errors.Bearing this in mind, it is difficult to refute Preston's own words on the matter.Confirmation from articles in the "Dundee Courier" in 1910 confirming completion dates of Watson's first and second aeroplanes pour cold water on the suggestion that he built and flew rocking wing aircraft any earlier.