Figure 9 P2O5 versus Al2O3 plot (after J. Victor Owen and Maurice Hillis, “From London to Liverpool: Evidence for a Limehouse-Reid Porcelain Connection Based on the Analysis of Sherds from the Brownlow Hill [ca. 1755–1767] Factory Site,” Geoarchaeology 18 [2003]: 875) showing the compositions of some eighteenth-century British phosphatic wares and their American counterparts (Bartlam, Bonnin and Morris). Data for Isleworth were compiled from Freestone et al. (“Composition of Porcelain from the Isleworth Manufactory,” 14 samples) and Owen (unpublished data, 12 samples). To simplify the diagram, data for two Liverpool factories (Gilbody, Brownlow Hill) are excluded.