In 1881 he was living at number 8, Buenos Ayres, Margate St John Baptist, Kent, England, and his occupation was given as auctioneer.
He married Augustine Walmisley on March 30th, 1872 at the Holy Trinity Church in Twickenham (district of Brentford, Middlesex)., when he was listed as a bachelor living in Blackheath. Below is a recent certified copy of his marriage certificate. This lists his father as being Pelham Richardson agent)
They had at least six children (from the 1881 census):
Ernest died in DecemberQ 1888 at the age of 39 in Cuckfield, West Sussex (BMD Cuckfield vol 2b p94).
Note: We know this is the correct family for Frank Engleheart Richardson because the census has a Frank Richardson of the correct age, with a father called Ernest (a given by his marriage certificate). This would be slightly flimsy evidence if it were not for the fact that Frank's children are called Mabel, Frank, Violet, Charles, James, Ronald and Raymond. So at least four of Frank's children (Ronald, Violet, Charles and Mabel) are named after Uncles and Aunts (John wasn't recognised, and James and Raymond have been made up - but perhaps these Uncles were born after the 1881 census!).