Hi Nellie
This is probably your William and Family per the Powys Fhs census returns.
Cannot find him in Brecs in 1861.Possibly in England.
BRECON SHIRE 1851
Parish of Llanfrynach
CHAMBERS John, h, m, 37, gardener, BRE St Johns, Lower Ty MawrCHAMBERS Margaret, w, m, 37, , BRE St Mary, Lower Ty MawrCHAMBERS Elizabeth, d, , 13, , BRE St Davids, Lower Ty MawrCHAMBERS James, s, , 11, , BRE Battle, Lower Ty MawrCHAMBERS John, s, , 9, , BRE Battle, Lower Ty MawrCHAMBERS William, s, , 7, , BRE Battle, Lower Ty MawrCHAMBERS Charles, s, , 5, , BRE Battle, Lower Ty MawrCHAMBERS Margaret, d, , 3, , BRE Battle, Lower Ty MawrCHAMBERS Thomas, s, , 2m, , BRE Llanfrynach, Lower Ty Mawr
1861 RADNORSHIRE
Glasbury
The Hamlet of Glasbury (Breconshire)
CHAMBERS John, h, m, 47, gardener, BRE St John, Llynbach Cottage
CHAMBERS Margaret, w, m, 48, laundress, BRE St Marys, Llynbach Cottage
CHAMBERS Margaret, d, , 12, , BRE Battle, Llynbach Cottage
CHAMBERS Thomas, s, , 10, , BRE Llanfrynach, Llynbach Cottage
CHAMBERS Jane, d, , 7, , BRE Llanfrynach, Llynbach Cottage
CHAMBERS Emma, d, , 3, , BRE Llanfrynach, Llynbach Cottage
1871 BRECONSHIRE
Parish of Llandefaelog Fach
CHAMBERS John, h, m, 58, gardener, BRE Brecon, Llandefaelog
CHAMBERS Margaret, w, m, 58,, BRE Brecon, Llandefaelog
CHAMBERS Emma, d, u, 12,, BRE Brecon, Llandefaelog
1871 BRECONSHIRE
Brecon St Mary's, Heolrhydd Ward
CHAMBERS William, h, m, 27, gardener, BRE Battle, Heolrhydd
CHAMBERS Elizabeth, w, m, 28,, BRK Newbury, Heolrhydd
CHAMBERS Emma, d, u, 8,, BRK Twyford, Heolrhydd
CHAMBERS William, s, u, 2,, BRE Llanhamlach, Heolrhydd
CHAMBERS John, s, u, 2m,, BRE Llanhamlach, Heolrhydd
FARR Thomas, bd, u, 34, timber merchant, BRE Hay, Heolrhydd
rhys