Hi Debbie: John Dobson with father Jonas would not surprise me at all. But when you say that you have John Dobson's baptism, is it from a parish register that was extracted into the IGI or was it submitted to the IGI by a researcher? Or did you order a certificate?
In looking at the IGI, I see various dates for John Dobson's birth, but none of them have a parent or parents listed. They are submitted by researchers and must be used with care.
Joseph Dobson's birth in IGI, on the other hand, is extracted from the parish register. His parents are listed as Joseph Dobson and Elizabeth Illingworth.
I believed that John Dobson and Joseph Dobson were brothers because they lived in neighboring houses. But they may only be cousins.
There are also two or three additional Dobsons to throw into the mix. In 1841, there is a 20-year-old Thomas Dobson living next door to Joseph Dobson. Whose son is he?
There is a Gilbert Dobson, and I know nothing about him except that there was a younger Gilbert Dobson, also, son of Susey Dobson Wood described in the next paragraph.
This second Susey Dobson is not the daughter of Joseph Dobson (my 2xgreat grandmother), but probably a sister of either Joseph Dobson. In 1841, she is married to John Wood and living in Ovenden, a few miles from Thornton. And Susey Dobson (my 2x great grandmother) is age 15 or so and living with her and her husband.
And now, as always happens, my head is hurting just about now.
As for Thomas Vernal and Nellie Dobson emigrating because of Albert Slater: it's possible that they knew of each other in England. After all, Albert's mother was a Dobson and might have been a near-cousin to Thomas Vernal Dobson. But Albert lived in the center of Halifax and Thomas lived in Bradford.
Someone on Rootschat wrote that Lawrence, Massachusetts had a very large population of immigrants from Yorkshire--to the extent that the Yorkshire accent was widely heard there.
Do you know, by the way, what street Thomas lived on in Lawrence? That might give some idea of how near to my Slaters he and his family might have been. If you've seen the 1920 census image, the street name is frequently listed in the left-hand margin, running up the page.
John
