George Wallaby was the senior custodian of the vast interior lake, Paruku (Lake Gregory) in the Great Sandy Desert, WA. His traditional name was Paruku (or as he pronounced it, "Baragu"). A respected law man and painter, Paruku was known as 'the rainmaker'. His dreaming (totem) was flood water and nearly all his work shows country around Sturt Creek and Paruku.

During the tropical monsoons Sturt Creek becomes a major floodway and fills the lake. This work shows Lirrejapal (Frog ) Dreaming country on Sturt Creek. When the floodwater recedes and the ground begins to harden and crack (sometimes as symmetrically as the painting suggests) Lirrejapal goes under ground and can hibernate for many years or until the next flood comes.