From 1871 census:
Reference RG10, Piece 2267, Folio 44, Page 17
St Lawrence, St Dennis, Cornwall
Roberts, Henry Head M 55 b Clay Labourer b St Dennis
Roberts, Mary Wife F 57 b Roche
Roberts, Richard Son M 22 Clay Labourer b St Columb
Roberts, Henry Son M 20 Blacksmith b St Columb
Roberts, John Son M 17 Clay Labourer b St Columb
That would China Clay works!Cornwall-OPC-database (.org) shows these baptisms:
All at St Columb Major; All to parents Henry & Mary Roberts
26th January 1845 William residing at Quoit Lane, father's occupation: Streamer born 29th December 1844
15th August 1847 Elizabeth Ann residing at Quoit Lane, father's occupation: Streamer born July 1847
25th December 1849 Henry residing at Quoit Lane, father's occupation: Streamer born 1st December 18491st June 1851 Edward residing at Quoit, father's occupation: Streamer born 9th April 1851
15th September 1853 Mary residing at Quoit, father's occupation: Streamer born 27th August 1853
29th September 1864 Elizabeth residing at Quoit, father's occupation: Tin Streamer born 21st August 1864
Probable marriage?
21st May 1842 at St Columb Major
Henry Roberts, age 29, residing Quoit, Bachelor, Streamer
Mary Kessell, age 22, residing Nine Maidens, Spinster
N.B. I can't find any marriage of Roberts to Hall?See reply #5!
His father: William, miner
Her father: William, labourer
Witnesses: Edward Kessell, Ann Kessell
Burials:
26th November 1883, St Dennis, Mary Roberts age 71
28th October 1886, St Dennis, Henry Roberts age 66

This is more likely:
7th November 1888, Calstock, Henry Roberts age 72 Union Workhouse