I think you can rule out the Newport Pagnell baptism as, in 1851, that Thomas SHAW is living in Blisworth, Northamptonshire. He is shown as aged 45, a hotel keeper, and born in Newport Pagnell, Bucks. He has a wife named Mary J. aged 42 born in Northampton and 7 children aged between 2 and 14 years. The youngest was born in Blisworth but all the rest were born in Northampton. The household also contains 2 barmaids, 1 governess, 1 nurse and 2 ostlers.
In the same census (1851) your Thomas SHAW is living at 42 Clarendon Street, Hulme, Manchester as follows:
Thos SHAW, Head, Mar, 45, working cutler, born Ivor, Bucks
Henrietta SHAW, Wife, Mar, 49, born Manchester, Lancs
Alice SHAW, Dau, Unm, 18, steam loom worker, born Portsmouth, Hants
Mary Ann SHAW, Dau, 10, scholar, born Manchester, Lancs
Elizth SHAW, Dau, 9, scholar, born Manchester, Lancs
Agnes SHAW, 8, scholar, born Manchester, Lancs
Ellen SHAW, Mother-in-law, Widow, 72, formerly laundress, born Hulme, Lancs
In the 1841 census the family are at 93 Wilmot Street, Hulme:
Joseph Francis LOWE, 55, joiner, not born in the county
Ellen LOWE, 55, born in the county
Thomas SHAW, 35, umbrella maker, Not born in the county
Henrietta SHAW, 35, cotton reeler, born in the county
Theodore SHAW, 10, born in the county
Alice SHAW, 7, not born in the county
Mary Ann SHAW, 9 months, born in the county
Because there is such a large gap between Alice and Mary Ann I thought it possible that Henrietta might be Thomas's second wife and I think the following entry from FreeBMD might be their marriage:
March Qtr 1839 Manchester Reg. Dist. 20 500
Thomas SHAW and Henrietta LOWE
This fits in well with Joseph Francis and Ellen LOWE (with whom Thomas and family are living in 1841) being Henrietta's parents. I also thought that Theodore might be just Henrietta's child and not a child of the marriage but haven't found any evidence to back that up. I have, however, found the baptism of Alice at Portsea Roman Catholic Church, Hampshire on 10 June 1833. The entry is in Latin as follows:
10 Jun 1833 Alicia dau of Thomae SHAW and Annae CLEGG, born 7 June
Thomas SHAW and Ann CLAGG or CLEGG married at St Thomas, Portsmouth on 31 Dec 1827. They also had another child baptised at Portsea Roman Catholic Church:
13 May 1831 Jacobus son of Thomae SHAW and Annae CLEIGH, born 4 April 1831.
I'm afraid that I can't offer up a baptism for Thomas but I can say that there is a document amongst the papers of Iver parish relating to a Richard SHAW and family dated 1809. This information comes from an index to Buckinghamshire Poor Law documents but it is not clear what it is. It could be a settlement certificate, a removal order, a settlement examination etc. The only way to find out would be to access the original document in the Centre for Buckinghamshire Studies in Aylesbury. However, there is no guarantee that this Richard is in any way connected.
Orpheus