Radiocarbon determinations on a series of low-carbon-content ceramic and wattle-and-daub samples were made to determine the validity of radiocarbon dates based on these types of sample materials. Good agreement between radiocarbon dates obtained from the ceramic samples and from charcoal samples stratigraphically associated with the ceramics suggests that radiocarbon dates obtained on low-carbon-content ceramic materials are reliable if appropriate precautions are observed. The confidence which can be placed on radiocarbon dates obtained on wattle-and-daub sample materials is, at present, somewhat less secure. Problems in the use of these sample materials are discussed.