"Then the peepers begin on a high key, with a singularly sweet and lucid voice, somewhere betwixt a silver-whistle and a glass-bell, smacking little of the mid: 'Eep!-eep-eep-eep! ee ee-ee! eepee! eepee-peepee! peep-eep! eepepee! eepepee! eepepee!' accompanied by a few trills long continued..."
1853, Charles Fenno Hoffman, Timothy Flint, Lewis Gaylord Clark, Kinahan Cornwallis, John Holmes Agnew, editors, The Knickerbocker, page 460