Oooh lots of questions, will try and answer them all as am eager for all help and assistance offered.
With regards to the spelling of the surname I've tried Swabey, Swaby and doing searches using Swa* and not turned up anything. Anyone who thinks they may have found a match please let me know and I will happily check it out.
I don't have a certificate for Williams earlier marriage to Martha, I have never been able to locate the marriage, it is possible they married overseas. I know the 61st Gloucesters Regiment were located in the following locations on the following dates:-
The movements of the 61st South Gloucestershire Regiment and 2nd Battalion, The Gloucestershire Regiment between 1861 and 1893:-
Devonport – 26th February 1861
Aldershot – 20th August 1861
Channel Islands – 20th February 1863
Ireland – 12th August 1864
Newfoundland - 26th September 1866
Quebec – 14th October 1866
Bermuda – 22nd October 1866
Nova Scotia – 24th December 1870
Ireland – 29th June 1872
Channel Islands – 26th June 1875
Aldershot – 27th May 1876
Dover – 23rd July 1877
Malta – 21st February 1878
Bombay – 8th September 1880
Quetta – 29th October 1880
Karachi – 1st March 1883
Poona – 6th November 1884
Ahmednagar – 1st July 1885
Poona – 1st January 1888
Bombay – 11th February 1888
Nasirabad – 9th March 1891
Aden – 27th October 1893
Devonport – 28th November 1894
The information was kindly sent to me by David Read at the museum. These dates tie in with Minnie's birth in 1877 in Dover. I believe William may have transfered to 2nd Battalion Welsh Regiment in 1892/93 in order to remain in India where he was to stay until his death in 1924.
The witnesses at his second marriage were an L Witkowski and his wife L A Witkowski (this turned out to be his second wifes sister and her husband), A S Connor (her mother) and W Faithful as yet unidentified. There is no other clue to his father other than the name William Robert Swaby and the fact that he hasn't put him as deceased but as the marriage was overseas in Poona then its possible they didn't have to put that on there.
As to why we ruled out the William in 1843 we sent off for the death certificate of the William recorded in the same quarter and it listed that he died aged 3 weeks and as the son of Robert Swaby and Jemima Joyce Swaby who I know are a different family, or believe to be a different family. In 1851 they didn't have a son called William just two daughters called Jemima and Emily. There may well be a connection to my line as there are two Swaby's I found in St Pancras, one called Robert who married Jemima, the other called Henry who married Matilda. I have traced a descendant of the latter and we have built up a family tree, he was born in 1819 in St Pancras and we think Robert was born around the same time, we believe they might be brothers although we have no proof of that, however I do know that the father of Henry was called Robert! So its very possible. But I stray from the matter in hand. They do not appear to have a William Robert Swaby in there family.
Thank you for all the responses, if I get anywhere with this I will be overjoyed but as stated previously I'm not holding my breath. It intrigues me that I can find no mention of William in the 1851 or 1861 census, nor of his father in either of those or the 1841 census, no record of a birth for William, or a death for his father. I have traced all the Williams with fathers called William in 1851 and ruled them all out as they are in later census records on dates when he was no longer in the country.
I do love a good mystery but have to admit this one is causing a few sleepless nights!! (the proof of which is in the time stamp on this message as I'm UK based and according to my clock on my computer its now 2.24 am). Thank you all once again, MyGenes