On 1 June 1850 & 1860, enumerators were to account for slaves in the following states:
Alabama, Arkansas, Delaware, Florida, Georgia, Kentucky, Louisiana, Maryland, Mississippi, Missouri, North & South Carolina, Tennessee, Texas, Virginia and, curiously enough, New Jersey.
Generally, only the number of slaves was recorded, but some enumerators recorded names.
 age, sex, color
 name of owner
 if a fugitive from another state
 number of slaves manumitted [freed]
 if deaf, dumb, blind or idiotic
 number of house slaves [1860 only]
In some cases slaves were listed in family groups, but generally were listed eldest to youngest.
The number of slaves gave hint to the size of the owner's property. A large number of slaves suggested a plantation. 1-2 slaves might be a clue to a small farm or business.