A recent analysis combining dendrochronology and radiocarbon dating supported the middle chronology as most likely. The exact dating is a goal of ongoing research based on radiocarbon analysis and dendrochronology. The developments of radiocarbon dating and dendrochronology have significantly advanced scientific knowledge in this area. For relatively recent periods data from radiocarbon dating and dendrochronology also support the MIS data. Hawley began her studies with Hewett in 1929, focusing primarily on dendrochronology and ceramic dating. Tree rings are the basis of dendrochronology, which dates wooden objects and associated artifacts. Evidence of this cold period is also found in dendrochronology and ice cores. The manor house is of medieval origins, incorporating fabric dated by dendrochronology to c. 1270. Some dates are approximate, based upon dendrochronology, architectural studies, and historical records. Some dates are approximate and based upon dendrochronology, architectural studies, and historical records. The dating of building via dendrochronology thus requires knowledge of the history of building technology. Her burial has been dated by dendrochronology to 1370 BC. The study of these rings is known as dendrochronology. It has been subject to extensive investigation, including dendrochronology, and DNA analysis. The earliest example of a Snowdonia House dated by dendrochronology is Dugoed at Penmachno.