Hi Lin,
Looked up the Brecon census 1851 for you, this is the only Bush family which might be
connected to the Bush you are looking for.
John Bush age 39, Butcher Born Somerset Buckland
Anne wife age 40, born Somerset Radstock
John son age 15, Butcher, born Somerset. Radstock
George son age 13, scholar, born Mon. Aberystruth
Arthur son age 6, scholar born Mon. Aberystruth
Frank son age 1 year, born Brecon Brynmawr.
Looking at the ages of the children I would say a few died inbetween as most had children
every two years. A big gap usually meant a death.
Hope this helps,
Cheers
Rose