Thomas Clark birth 31 Jan 1811 in Invernessshire, Scotland

[mcadamsd]

Given the 1870 Michigan info it would seem that Spouse Mary A. ? may have passed before 1870 or perhaps a divorce?

Given the last child born(1851) was in Michigan, possibly she passed there or they separated there.

[mcadamsd]

Given Michigan census data it seems Thomas left Michigan between 1860 and 1880/81. 

There is an arrival document for a Thomas Clark birth about 1811, arriving in Ontario in 1871 but there is no detail or image available.  There is also a William Clark arriving same year but unable to see if it was Thomas and son William travelling together. There is a "Source Publication Code" listed and it is different for the two men.

I assume that if these are the relatives they may have missed the 1871 census in Canada.

Is there an online source for the travel record images or detailed transcriptions?

[Jacquie in Canada]

Do you have any proof that William returned to Canada? There is an entry for a William Clark who matches your William on the 1880 US census in St. Clair, St. Clair County Michigan with a wife named Ella:
https://www.familysearch.org/ark:/61903/1:1:MW36-TM7

I haven't found a marriage for this couple yet but it would seem to be a possibility that this is your William.

Jacquie

[Jacquie in Canada]

There is an arrival document for a Thomas Clark birth about 1811, arriving in Ontario in 1871 but there is no detail or image available.  There is also a William Clark arriving same year but unable to see if it was Thomas and son William travelling together. There is a "Source Publication Code" listed and it is different for the two men.

I believe the entries you are looking at are from the Bruce Elliott "Index to the 1871 Census of Ontario". It is a list of people who are in Ontario on the 1871 census that were born in another country. The 1871 date is not the arrival year - it's the census year.

If the source bibliography listed is different, please post what it is.

Jacquie