I don't see a date on the sheet music, but here is what the actual search turned up:

Levy Call Number:        Box 130, Item 131a
Title:        The Whip-Poor-Will's Echo Song.
Composer, Lyricist, Arranger:        By H. Millard.
Publication:        Boston : Oliver Ditson & Co., 277 Washington St.
Date:        1865
Form of Composition:        strophic with chorus
Instrumentation:        piano and voice
First Line:        Oh, meet me when daylight is fading, and is darkening into the night
First Line of Chorus:        Whip-poor-will! Whip-poor-will! You hear the first whip-poor-will's song
Advertisement:        ads on back cover for Oliver Ditson & Co. stock
Subjects:        Birds; Dwellings; Trees; Musical instruments; Parlors; Vases; Mantelpieces; Cupids; Stairs & stairways; Architectural elements--columns; Plants; Courtship; Love; Time
Duplication:        cover and music same as Box 130 Item 131 (See: Box 130 Item 131)