Listen to I've Been Working on the Railroad (Instrumental Version) online. I've Been Working on the Railroad (Instrumental Version) is an English language song and is sung by Smart Baby Lullabies, Lullabies for Deep Meditation and Bedtime Lullabies. I've Been Working on the Railroad (Instrumental Version), from the album Baby Naptime Songs - Mary Had a Little Lamb (Guitar), was released in the year 2017. The duration of the song is 2:07. Download English songs online from JioSaavn.