This type was originally defined by Jesse Jennings and Charles Fairbanks based upon sherds that had a distinctive complex style of stamping from the Napier site just east of Macon.
Intricate, detailed, complicated designs on relatively thin grit-tempered pottery. The lands and grooves on the pottery are typically thinner and narrower than Swift Creek designs. Many Napier designs were observed. Designs include: (1) multiple lines which passed back and forth across each other with parallel line filler, (2) zigzagging multi-line strands that form diamond-shaped enclosures with parallel line filler, (3) multi-line straight bands with multi-line chevrons, (4) combinations of small concentric circles with multi-line diamonds, crosses, or chevrons with parallel line filler, (5) herringbone lines, (6) curving multi-line Xs, bordered by rainbow bands, (7) two curving multi-line strands intertwined with parallel line filler, (8) nested diamonds, (9) multi-line diamonds with short lines radiating from them and framed at the sides with multi-line zigzags, (10) multi-line strands crossing each other similar to a bracelet motif, (11) a looped linear L shape with multi-line strands crossing behind it, (12) curvilinear hourglass shapes paired side by side with parallel line filler, (13 ) concentric circles set in multi-line figure eights crossed by three parallel lines, (14) shield-shaped line-filled motifs in pairs side by side with parallel line filler and the area between the pairs filled with cross hatching. Known vessel forms include deep beakers, globular jars and bowls with incurving lips, bowls with straight or rounded flaring sides, bowls with widely flaring slightly rounded sides, and shouldered jars with straight vertical collars.