Do you know anything about "Immigrant Trains"? My ggrandfather took his family in the 1880s to Nebraska via the immigrant train.

In Ontario railway records are housed in the Archives of Ontario (RG11, Series N). There are lists of people who received assistance with train fares, and lists of internal railway passes issued to new immigrants. The AO website has extensive information, instructions and guides on how to access their holdings, not just railway records, but every record they have archived. See: The Collections at Archives of Ontario and Customer Service & Research Guides