That's Why You're Mary Mine
Instrumentation
Piano
Ukulele
Refrain
There's a reason for calling you Mary, A
Composer
Roy King
Lyricist
Harry Mayo
Sidney D. Mitchell
Copyright (this edition)
1925
Citation
“That's Why You're Mary Mine,” SCPL Sheet Music Catalog, accessed February 9, 2026, https://sheetmusic.santacruzpl.org/items/show/43979.