In Interpreting relationships to head of household in 1855 New York State Census? I mentioned that:
Robert [Sellars] is another son who [in 1855] was living in the same Albany ward as Hugh (senior) that I am still looking for in the 1860 census when I think he may have been in New York City
I think that I may have found him in a record from:
Ancestry.com. New York, Compiled Census and Census Substitutes Index, 1790-1890 [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 1999.
which has these details:
Name: Robert Seeller
State: NY
County: New York County
Township: 17 W. Nyc District 6
Year: 1860
Record Type: Federal Population Schedule
Page: 047
Database: NY 1860 Federal Census Index
Is the image from which these details were taken available online anywhere?