Thanks, Ladyhawk, for your input.
There is further "circumstantial" evidence linking Thomas Frederick DUCKHOUSE/DUCAS with Martha DUCKHOUSE/NORTON/HOLDEN.
One of the witnesses at his marriage to Ellen PARDOE on 14 Oct 1890 at Hednesford (St Peter) is a Henry HOLDEN and one of the witnesses at the marriage of Martha NORTON to Henry HOLDEN at the same church on 21 Dec 1890 is a Thomas DUCKHOUSE.
The DUCKHOUSE family are on my wife's tree and haven't been a concern of mine until recently. I have now discovered that 2 of the sons of Thomas Frederick DUCKHOUSE, namely Stephen (b1897) and Albert Edward (b1901) were taken into the care of Barnardos and were shipped out to Canada in 1910 as part of the British Home Children disgrace. I have found both together on the 1910 passenger lists and separately on the Canadian 1911 Census living miles apart in unrelated households.
The family with whom Stephen DUCKHOUSE was living treated him as one of their own and still have his original Barnardos trunk at the farm which they still own. They have invited my wife to go and stay there in a few weeks time and have asked for as much family background information as possible - hence my sudden quest for information.
The eldest son Fred DUCKHOUSE, my wife's Grandfather, was the unnamed 9 day old baby shown living with his parents and grandparents on the 1891 Census.
At the time of the 1901 Census his parents and siblings lived together in Warwick Rd, Yardley whereas Fred was still living with his grandparents, William and Eliza PARDOE, in Poplar Ave, Yardley.
He was still with them on the 1911 Census but was at that time joined by his mother, Ellen, and his 3 brothers who had remained in England, John, George and Walter. His mothers status is shown as "married" but I can find no trace of the father, Thomas Frederick DUCKHOUSE, after the 1901 Census - no death, re-marriage, census, rates, migration, military, poor house, prison record or anything else - he just disappeared into the ether. Perhaps he changed his name again - maybe to HOUDINI.
The arrival of the 1872 Birth Certificate of Thomas Frederick DUCKHOUSE should make his origins a lot clearer but will not help with his ending.
I am awaiting information from Barnardos that might throw some light onto the subject, but that could take months to come.