1897-06-15, New York Herald, p.7
In every part of the city flags were dis-
played. "Gus" Whitehead sat on the roof of
the Fifth Avenue Hotel yesterday, flying
three red kites that floated a big flag over
Madison Square. He had a line out to the
length of 5,000 feet, which frequently attained
a pulling power of from forty to one hundred
pounds.
Statement of Charles Whitehead (son) to Stella Randolph
In "Lost Flights of Gustave Whitehead", p.26, Stella Randolph writes:
"Charles Whitehead, son of Gustave, reported that his father's work with the Horsman Company , a concern interested in selling toys, was to demonstrate kites for advertising purposes. Keeping fifteen kites in the air at a time was one of his duties."
1898-07-07, New York World
The illustration accompanying the article below shows Horsman kites being flown near the same location and in the same manner as done one year previously by Gustave Whitehead: