No. the William born in 1875 married Betsy Smith, this William was the son of Amos and Betsy, and this Amos was the son of Amos and Charlotte nee Brackenbury, this Amos senior was a brother of your Cammack.
Sam was born in the Haven Bank farmhouse on 5th Nov 1812 and baptised at Coningsby on 8th Nov 1812. He worked his father’s land and then became a farmer in his own right and did very well for himself, inherited some land and acquired more and branched out into being an innkeeper at the same time. By1851 he was farming over fifty acres, not as a tenant but his will showed he owned the land. He ran the public house on the Haven Bank side of the Witham and had a financial interest in the pub on the opposite side (Tattershall Bridge) because it was actually built by the Lamymans. He married Rebecca Martin, George and Susannah Martin’s daughter from Wildmore Fen, (the marriage certificate shows her “of Coningsby Allotments of this parish” ) on 25 Nov 1832 in Wildmore Fen, Thornton le Fen chapel - there were lots of red brick chapels of various denominations across the fens from there to Boston, most have now gone or been converted to dwelling houses - and they lived happily ever after as far as I know. Well, they must have been reasonably happy because they had fifteen children from 1839 to 1857, one being the Hilton Lamyman who became well known as a preacher. Sam died 13 Mar 1880 at Scrub Hill and was buried three days later at Coningsby. He left seventy seven acres to his sons, who by that time were living on and working the inherited land, mostly down Anwick Fen (though there was some mortgage outstanding) and the Scrub Hill farmhoue and and three acres to Rebecca who survived him. He also left money to his six living daughters and a cow to Robert Atkin. Just a note here - the Coningsby parish records from 1807 to 1816 were cut out of the registers and were recompiled from information supplied by the families. Rebecca lived in the farmhouse until she died on 7 Feb 1891, buried 11th Feb 1891 at Coningsby. She died intestate and Administration passed to son William who was then farming at Haven Bank.
Sam’s father was William Lamyman and his mother was Elizabeth, nee Cammack (Cammocks), a family spread across the fens towards Boston. She was the daughter of Samuel and Rebekah Cammack from Chapel Hill and was born in 1784 She and William married 18 Apr 1803 at Wyberton, the marriage register entry reads: ‘ William Lamyman of Coningsby parish, bachelor and Elizabeth Cammack, single woman, of this parish" Both signed. Witnesses James Nicholls and Henry Gibson.’ . William was already a farmer though not with as much land as Sam eventually had and he lived at Haven Bank (he is shown as being baptised at Hawthorn Hill but that will be the same place). William acquired more land at Billinghay Dales (some there had been inherited from his dad, the first one to get any land there) but although it was called Billinghay Dales it was the land just the other side of the Witham at the old Tattershall Bridge where the Lamyman pub was (and still is, ie the pub is still there but not owned by a Lamyman now). William and Elizabeth had ten children, one of whom was Sam and one of whom was your Cammack (1807), not to be confused with another son they called Jonathan Cammack. In actual fact William and Elizabeth must have been sneaking out well before they got married, perhaps she was too young or perhaps one of more parents didn’t approve of his/her choice. Their first child was Susannah "Susannah, dau of Elizabeth Cammocks, Coningsby" 8th May 1802 and the second one was Jonathan Cammack Lamyman “"Jonatham, son of Elizabeth Cammocks, the reputed father William Lamyman of Dogdyke". By 1807 the baptisms were including the father, eg 30th May 1907, Cammack, Son of William and Elizabeth Lamyman, Haven Bank". Anyway William died 7 Oct 1850 and he left a couple of plowed fields and a grass field at Haven Bank plus the land at Billinghay Dales to his four sons and additionally the house at Haven Bank to Jonathan but I think Elizabeth could live in it; in any case he left her a Cow and a Pig and Two Good Beds. Her residence was given as Billinghay Dales when she died in March 1855 so they must have had a dwelling there as well as the land - he refers to it only as “my estate”. The people who have, or had, the pub told me a few years ago that the red brick house opposite the pub was occupied a Lamyman years ago.
I’m not going to do it on this forum but I have your George’s family back well before this. He wasn’t the only one to have his name spelled with ‘mm’ - it just depended on who the scribe was and lots of them were at one time another attributed with ‘mm’. Young Edward who was hit by lightning at Tetford has Lameman on his gravestone but Lammiman in the register for example. Yes, I guess Cammack is on the photograph, you could identify him maybe if they are standing in birth order. I can’t copy it myself but is there any way I can give you an email address for your eyes only? I don’t know who you mean by Joseph and Rebecca: the Joseph at Tattershall Thorpe married Matilda Swannack not Rebecca, he was the grandson of your Cammack.