Hello, Sorry, but I don't have a 1850 census record of Warren.
There is a record in NY City of Jenette Russel and Jane A Russel in the 1850 census. The only problem with the 1850 Census in NY, NY is that "Jane A Russel" is listed with a date of birth of 1824. They are living in the household of or in the same apartment building as a William M Pratt, b1797 in CT and Julia S Pratt b1801 in CT.
Jeanet has a sister Julia born 1801 in CT who married William Pratt from CT on 19 Feb, 1817, so It is certain that "Jenette" and "Jane A Russel" were living with jeanet's sister Julie in NY, NY in 1850 and Warren was not living with them at that time.
I learned the information about Jeanet's family from a book scanned into Google bBooks called
"The Chapman family: By Frederick William Chapman.
There are 6 children, including Jeanet, of Oliver Atwood and Dorothy Chapman listed with dates of birth and spouses with dates of marriage.
I should not jump to speak before thinking, but before I found that book I was assuming he died between 1851 and 1860 because Jane A Russell married SB Prentiss in 1851, and she and her mother both lived in the Prentiss household by 1860.
Now that I see the record from NY it seems that he was gone from the household by 1850, whether they separated or he died is still a mystery, as is the reason Jeanet had dropped the Russell surname by 1860 and gone by just Atwood.
Thanks for the link to the "find a grave" site!