There is another theory from my own family research that I can add to this family.
The birth record of John Henderson b 1873 in Cambusnethan to William Henderson and Margaret Buchanan may add some clarity.
Address at time of birth?
It is fairly clear that Peter Casey and (Son In Law?) William Henderson were both miners.
Their addresses on all census returns are in mining areas.
Death of Margaret Casey/ Henderson states she was born in Newton.
Census data shows Cambuslang.
In this time period, Newton, Cambuslang was home to many coal miners
I have a relative who was an undergound Colliery Manager at Dundyvan Colliery, Coatbridge ( Old Monkland) up until 1873.
He emigrated to NZ in 1874 to take up the post of Colliery Manager at Waimangaroa.
I have always believed that his passage and job offer came through the Presbyterian Church.
I have never located his arrival in NZ.
It is highly likely that William Henderson did not travel to NZ on spec but, already had a job offer at Waimangaroa in the Buller District.
My relative or the church may have recruited other miners from Dundyvan and local collieries to work at Waimangaroa.
If so, it would explain the Hendersons emigration of 1874.
My family story is complex but, my relative's entire family were booked on a passage to NZ in 1875.
This sailing was cancelled and no one from his wider family made this trip until 1881.
Family history states that all sailings were cancelled due to infection control but, I now wonder if he was also aboard the Strathnaver??
It would make sense.
If anyone has access to this record could you please have a look?
Relative's name was Archibald Ferguson aged about 32yrs old and I am certain that he travelled with his brother James, aged about 19yrs.
( I don't need any info on the Fergusons after their 1874 arrival only interested in whether they were on this ship or not)