 The Tithonus poem is twelve lines long , and is in a metre called " acephalous <unk> with internal double @-@ <unk> expansion " . It is the fourth poem by Sappho to be sufficiently complete to treat as an entire work , along with the Ode to Aphrodite , fragment 16 , and fragment 31 : a fifth , the Brothers Poem , was discovered in 2014 . 
