DAACS staff aim to produce a seriation-based chronology for each slave-quarter site using the same methods (see Neiman, Galle, and Wheeler 2003 for technical details). Only assemblages from features or stratigraphic groups with more than five ceramic sherds are included in these ceramic-based seriations. Although many Middleburg features and stratigraphic groups contain more than five sherds, DAACS has currently been unable to produce a statistically significant seriation-based chronology for the site.

However, Mean Ceramic Dates for the entire Middleburg site (MCD=1770) and the main excavation block (MCD=1771) point to the site's temporal placement in the third-quarter of the eighteenth century.

Two other chronological measures that are less sensitive to excavation errors and taphonomic processes that might introduce a small amount of anomalously late material into an assemblage were also calculated. They are TPQp90 and TPQp95.

The TPQp95 of 1775 provides a robust estimate of the site's TPQ based on the 95th percentile of the beginning manufacturing dates for all the artifacts comprising it. The TPQp90 of 1762 provides a more robust estimate of the site's TPQ based on the 90th percentile of the beginning manufacturing dates for all the artifacts comprising it.

The following table displays MCDs and TPQs calculated using ceramics from all excavated contexts at Middleburg.

The following table displays the MCD and TPQs calculated using ceramics from all excavated contexts in the main excavation block.