Horace Somnusson is one of Miss Peregrine's peculiar children—a male syndrigast with the peculiarity of having prophetic dreams.
Horace made a brief appearance in Miss Peregrine's Home for Peculiar Children.He first appeared while Jacob was having dinner with the peculiar children, and was the first one to tell Jacob how old he is. Later, Horace is one of the children who goes to the beach, along with Emma, Millard, Bronwyn, and Hugh. He often mentions clothes. When Miss Avocet got attacked, he joined Enoch in teasing Olive and Claire. Near the end of the book, he says he has dreamed about the place where the wights are keeping the ymbrynes and is able to draw it.
Horace, along with Fiona, was sent by Emma to gather wood for a fire. However, they returned with no wood, because they couldn't find any wood, and they didn't go in the actual woods because it was too scary ("we heard an owl"). He and Fiona were the ones who alerted the others to the zeppelins. He was also the one who packed food when they left Miss Peregrine's loop, and the one who took money from Miss Peregrine's loop before they left, which allowed them to buy train tickets. Horace was singled out by Mr. White as the weakest of them, but Horace still refused to tell Mr. White where Miss Peregrine was, telling Mr. White that Miss Peregrine was in his "mother's knickers' drawer." Horace was the only one who managed to catch a pigeon when they were looking for the peculiar flock of pigeons, and he later stopped Melina from killing him, Emma, and Jacob, by proving that he was peculiar. He said he dreamed about her and her past life, which suggests that he dreams about more than just the future.
Because of everyone's teasing, Horace wished to join Miss Wren's army to prove that he is not a coward. He is shown to have studied peculiars even more than Millard, mainly because his dreams urge him to.
At the end of the book, Horace was captured along with most of the other children.
Horace was captured by the wights with most of the other peculiar children. When he saw Jacob, he gave him a scarf, telling him that Miss Peregrine had given him some knitting needles, and that Horace thought being able to knit the scarf had kept him from going mad. He asked Jacob to wear it for luck. Later, it saved Jacob's life, and it was revealed to have been made from peculiar sheep wool.
When Emma didn't receive any more letters from Jacob, she remembered the email Jacob set up for her, and Horace was able to guess the password of the email. He was with the other children at the end of the book at Jacob's house.
Horace's peculiarity is that he has prophetic dreams, meaning that while asleep, his dreams are of the future. He can tell the futures of others more easily if he doesn't know them well, because according to Emma, emotion clouds his vision. In Hollow City, he had a dream about Melina's childhood, which suggests that he dreams about more than just the future.
Enoch and Horace are considered as friends. Horace and Enoch slept with their backs to each other in Hollow City, and Horace once teased Enoch.
- He has a secret pocket in his coat.
- In Hollow City, it is revealed that Horace has a lucky pillow that is the only thing that keeps him from having his paralyzing nightmares.
- His last name is probably derived from Sumnos, the Roman god of sleep (Greek equivalent = Hypnos).