Samuel Normans marrying a Mary within a narrow timeframe in the same locale certainly muddies the waters. After posting replies #1 and #3 and checking out the 1920 (sic) burial at reply #2 I drew up the following time line -
FindMyPast baptisms and marriages (transcripts only available)
The parents in each baptism are a Samuel and Mary Norman. Father's occ. included where transcribed
Mar - Samuel Norman, bach and Mary Larman spin, 6 Dec 1819, Langford, St Andrew
Mar - Samuel Norman, 10 Jun 1822, Husborne Crawley and Mary Arnold, St Mary Magdalene/St James
Bap - George, 28 Jul 1822, Husborne Crawley, labourer, St Mary Magdalene/St James
Bap - Mary, 2 Nov 1823, residence Langford, labourer, Langford St Andrew
Bap - Thomas, 1 Jun 1823, residence Langford, labourer, Langford St Andrew
Bap - Edward, 31 Jul 1825, Husborne Crawley, labourer, St Mary Magdalene/St James
Mar - Samuel Norman, 27 Oct 1828 and Mary Dawborn, Woburn St Mary
Bap - Elizabeth, 6 Jun 1830, residence Woburn, labourer
Bap - Sarah Ann, 5 Nov 1831, residence Langford, labourer Langford St Andrew
Bap - Hannah, 15 Apr 1832, residence Langford, labourer, Langford St Andrew
Bap - George, 16 Jun 1833, Woburn, labourer, Woburn St Mary
Bap - Henery (sic), 17 Nov 1833, residence Langford, labourer, Langford St Andrew
Bap - William, 24 May 1835, Woburn, labourer, Woburn St Mary
Bap - Ann, 7 may 1837, Woburn, labourer, Woburn St Mary
Bap - George, 13 May 1838, residence Langford, labourer, Langford St Andrew
Bap - James, 25 Jan 1839, residence Union Workhouse Biggleswade, lab'r, Biggleswade St Andrew
Bap - Phoebe Fanny, 29 Sep 1839, labourer, Woburn St Mary
Bap - Hannah, 14 Mar 1841, residence Langford, labourer, Langford St Andrew
Bap - Joseph Thomas, 20 Nov 1842, Woburn, labourer, Woburn St Mary
Church names are useful when grouping.
The Husborne Crawley baptisms of Normans cease after 1825 probably (no guarantee) as a result of the death of Samuel, 1 Jun 1826, age 24, hubby of Mary Arnold. They appear to have named their 2nd child Edward which is a link (again no guarantee) to the baptism of Samuel, at Ridgmont, 6 Dec 1801, parents Edward/Elizabeth
The paucity of detail on these early baptisms generates speculation.