Henry George Butcher Born About 1825 IN Kent UK

My great grandfather is Henry George Butcher who was born in Kent and died in Australia - his father Henry George Butcher, i believe was born about 1825 in UK, his mother was Keziah (surname unknown)

Henry married Martha Mary Bowman in Australia in 1899.. i have their marriage certificate which showes his parents details I am having a great deal of difficulty in finding any information about either of them.. any help will be very much appreciated!

Cheers Trish