Sleep, and his Brother Death

The reference on the second napkin was obscure enough to begin with, but having remembered it backwards makes it so obscure that I better footnote it. It's from the opening of Shelley's Queen Mab, which I had in mind as I drew these two cartoons:

How wonderful is Death,
Death, and his brother Sleep!
One, pale as yonder waning moon
With lips of lurid blue;
The other, rosy as the morn
When throned on ocean's wave
It blushes o'er the world;
Yet both so passing wonderful!