This looks like it could be Nathan's father in the 1840 census if they were living in Madison Co.:

Source Citation: Year: 1840
Census Place: , Madison, Alabama
Roll: 13; Page: 138
Name: Danl Curry
County: Madison
State: Alabama

1 male 5-10
1 male 10-15
1 male 30-40
1 female 5-10
1 female 20-30
TOTAL: 5 persons
1 person engaged in Agriculture