SunthornPhubegan the epic poem, “ PhraAphai Mani” in prison during he was arrested because he fought with someone while he was drunk and published it in installments over the next twenty years. .
King Rama IV's daughter read his unfinished work PhraAphai Mani, and asked the poet to complete it. King Rama IV appointed Phu as Director of Royal Scribes, and awarded him the title of "Phra". He spent the rest of his life at peace until he died in 1855.