Arthur Machen was born in Caerleon on Usk, in the county of Gwent, South Wales, in 1863, and baptised into the Anglican faith, as Arthur Llewellyn Jones. His father, John Edward Jones (Machen was his mother's maiden name), was an Anglican priest, vicar of the tiny church of Llandewi, near Caerleon, and the boy was raised at the rectory there. A solitary child, he learned first to love the gentle slopes of the nearby Soar Brook, then later the more awesome fastnesses of the Black Mountains which lay to the north, and to the east the ancient forest of Wentwood and the remoter Severn Valley. Though he returned only rarely to Gwent in later life, his work continually evoked its darker landscapes, often as a prelude to wonder or terror.
The child was awed, too, by the findings of local archaeologists, who in the 1870s were digging up strange pagan sculptures and inscribed stones dating from the Roman occupation of the region. Machen's grandfather had found Roman inscriptions and carvings in his own Caerleon churchyard, and the boy's imagination was captured early by the sense that the ground itself was haunted with a tangible and pagan strangeness - an intuition on which he drew for much of his best fiction writing. The Romano-British god Nodens, whose temple was excavated at nearby Lydney Park in his boyhood, turns up in some of his most memorable horror fiction.
At the age of eleven he was sent to Hereford Cathedral School, where he received the standard classical education for a middle class boy. He was an able pupil, but remained an aloof one, interested already in the strange and arcane byways of literature and history. He showed much scholarly ability, but his parents were not rich enough to send him to Oxford in his father's footsteps. After some false starts and after his (anonymous) first publication Eleusinia, a verse account of the Eleusinian mysteries, now very much a collector's item, his parents persuaded him towards a career in journalism. In pursuit of this he went to live in London.