Tom, I tutor in genealogy as well as do some professional research. The answers will be at Scotland's People, but because it's a pay site, you'll have to cover the cost and do the work yourself. But it's quite easy and inexpensive at about $2 per lookup. IGI has christenings for Robert & John in Roxborough and Lanark. One is an extracted, the other a user submission. The various locations suggest the family didn't stay in the one place for long, so any records for the other children may well be scattered.. I can't see them in 1851 census of Scotland or England which suggests they migrated before that date. I don't know if there is census of Canada around 1850. Otherwise, you might have to look for shipping records. I'd also look for possible marriages of the eldest daughters Janet and Ellen before leaving Scotland. That might help fix a date for migration. It would be helpful to see if their first child was born in Scotland or Canada. Peter in Sydney