Somnus, the god of Sleep, a brother of Death, and a son of Night, represented, he and Death, as two youths sleeping or holding inverted torches in their hands; near the dwelling of Somnus flowed the river of Lethe, which crept along over pebbles, and invited to sleep; he was attended by Morpheus, who inspired pleasing dreams.
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Somnath, Idol of * Sonata