In the lower Ohio River valley in Illinois, Kentucky, and Indiana, the Mississippian-culture towns of Kincaid, Wickliffe, Tolu, and Angel Mounds have been grouped together into a "Kincaid Focus" set, due to similarities in pottery assemblages and site plans.
Most striking are the comparisons between the Kincaid and Angel sites, which include analogous site plans, stylistic similarities in artifacts, and geographic proximity.
These connections have led some scholars to hypothesize that the builders and residents were of the same society.

The 300- to 400-year span in which these types of artifacts and sites are found is called the "Angel Phase".
It is divided into three subphases: 
Rare painted and incised sherds of Mississippian culture pottery have been found at all four sites, ranging from less than one percent near Kincaid to about three or four percent of the assemblage at Wickliffe.
Some common pottery styles found in these sites include: Angel Negative Painted, Kincaid Negative Painted, and Matthews Incised.
This pottery is shell-tempered and ranges from the smoothed surface and coarser temper of Mississippi Ware to the more polished surface and finer temper of Bell Ware.
In the lower Ohio River valley in Illinois, Kentucky, and Indiana, the Mississippian-culture towns of Kincaid, Wickliffe, Tolu, and Angel Mounds have been grouped together into a "Kincaid Focus" set, due to similarities in pottery assemblages and site plans. Most striking are the comparisons between the Kincaid and Angel sites, which include analogous site plans, stylistic similarities in artifacts, and geographic proximity. These connections have led some scholars to hypothesize that the builders and residents were of the same society.
The 300- to 400-year span in which these types of artifacts and sites are found is called the "Angel Phase". It is divided into three subphases: 
Rare painted and incised sherds of Mississippian culture pottery have been found at all four sites, ranging from less than one percent near Kincaid to about three or four percent of the assemblage at Wickliffe. Some common pottery styles found in these sites include: Angel Negative Painted, Kincaid Negative Painted, and Matthews Incised. This pottery is shell-tempered and ranges from the smoothed surface and coarser temper of Mississippi Ware to the more polished surface and finer temper of Bell Ware.
Angel Mounds