Last Summer (1980), While Traveling North From Potter County, Pennsylvania, To Wellsville, New York, My Companions And I Came Upon Twenty Balloons Floating Silently Over The Landscape. It Was A Spectacularly Beautiful Sight. Each Balloon Had A Different Design. Some Balloons Were High, And Some Were Tree Top Level Or Even Lower. The Only Sounds Were Those Of Voices And An Occasional Blast From The Propane Burners. Mongolfier Would Have Loved It!
https://en.wikipedia.org/wiki/Montgolfier_brothers