The theme of Aquarius was a favorite theme of Bill's.  He did individual paintings of this in different media including charcoal and also in oils directly on the wall such as the one he painted at a family reunion at his brother Dearl's home.

Bill became allergic to working in oils resulting in his development of working in other media such as with Lithographs.  His sister Theta recalls "when he was printing the FIESTA de FLORES, Bill paced the floor wringing his hands and wiping his brow.  One would have thought he was having a baby and in a way he was.  Each color had a different sandstone run on top of each other.  When the color was not to his satisfaction, he would tweak the color a bit.  Finally he had a product that he liked."    Bill was often inspired by people he saw and the FIESTA de FLORES was of a young boy in Mexico whose creativity for his costume for the parade captivated Bill's attention.  Bill had also done a previous oil painting of the young man.  Lithographs allowed Bill to take the same picture and reproduce it in various colors and textures.  Some of these Lithographs can also be seen at the Smithsonian American Art Collection.