'Jimbo's Lullaby' is from the collection of pieces entitled 'Children's Corner" which Debussy wrote for his three year old daughter, whom he nicknamed 'Chouchou" ('little pet' in French.)

The reference below is an excerpt from the 'Debussy' biography written by E. Robert Schmitz, Schmitz who as well as biographer, was a close personal friend and frequent visitor to the Debussy household.

E. Robert Schmitz:
'Jimbo, a little velvet elephant, pudgy and soft, one of those favorites of Chouchou's allowed to partake in the ceremonials of her own bedtime; but the little elephant, too, must have one last story, one last song before entering the land of Nod, with his charming little mistress."

"Music is the Pen of the Soul"