“Zeitschrift für Luftschiffahrt” Jan. 1898, p.27, Bericht des “Wiener Flugtechnischer Vereins”
English translation:
Club News 27
In the first category - those making artificial flights in a regular manner - the speak-
er first cited the experiments of Dr. K. J. Dunilowski in Charkow, who is said to have
actually left te ground approximatly 80 times within a space of 2 hours; then those of
an American, Whitehead's "Condor Gus", with two pairs of wings.
Original text (German):
Vereinsnachrichten 27
Als e r s t e G r u p p e den g e w ö h n l i c h e n Kunstflug nehmend, erwähnte
der Vortragende der Experimente des Dr. K. J. Dunilowski in Charkow, der binnen
2 Stunden circa 80 mal thatsächlich aufgestiegen sein soll; dann des Amerikaners
Whitehead's: "Condor Gus" mit 2 Flügelpaaren.
Letter, John Whitehead to Stella Randolph, Sept. 3, 1934, pp.7-8
"I also remember my Brother telling me
quite often of his connections, also backing
he had with a Professor Pickering of some
one of the New England State Universitys in the
ninetys, when he was still single, he told
me often of his long flights he made in
Gliders those days..."