sentences:  Gwilym Hiraethog took his pseudonym from his birthplace, a farm on the Hiraethog mountain in Denbighshire.Largely self-educated, he was a polymath, who took an interest in astronomy and political science as well as being a Nonconformist minister and a leading literary figure.In 1843 he founded the Welsh language journal "Yr Amserau ("The Times")" in Liverpool.