This is the 1900 census "extraction" at Ancestry.com for Samuel Neill. The "Suggested Records" includes several items (at the time of this post):
- 1910 United States Federal Census--yes it's him.
- 1871 Scotland Census--not him.
- 1880 United States Federal Census--yes it's him.
- Ireland, Births--not him.
- U. S. and International Marriage Records--yes it's him, but this is pretty much not all that helpful.