One Alone is a popular love song composed by Sigmund Romberg with lyrics by Oscar Hammerstein II and Otto Harbach for their operetta The Desert Song; it is the "western" part of a scene in the operetta contrasting eastern and western notions of love. It was introduced by Robert Halliday.
The song has been subsequently covered by Nat Shilkret and the Victor Orchestra, and Don Voorhees.[1] Dave Brubeck recorded it on his 2002 album of the same name.[2]