Referring to total aircraft built:

Gustave Whitehead is a humble night watchman at Bridgeport, Conn. Dur-
ing the day, however, he is a scientist. He is devoted to problems
of air navigation and is a compeer of Maxim, Langley, Von Zeppelin and
others equally well known in aeronautics. He has built fifty-six
flying machines. The present perfected invention is his fifty-seventh
and in it, he embodies his principles of bird flight as applicable to
man.

Referring to manned aircraft:

"This new machine will be the twentieth I have made," Whitehead said as he paused in his work to-day and talked about the invention that promises to make him famous for all time. Eighteen of them were failures through some small fault that I could not fathom at the time. But the last one I made rewarded my years of effort and accomplished what I have so long been trying to solve."