This appendix contains elemental concentration values for samples taken from the ceramic body of the 151 objects in the Sackler Maiolica Collection. The data are grouped according to the presumed origin of the objects with accession and sample number, object type and sampling location listed for each analysis. Elemental concentration values of Na, K, Ca, Sc, Cr and Fe were determined for each sample by neutron activation analysis. A discussion of the growing role of chemical data in provenance studies of Maiolica is included and sampling and analytical procedures are described.