have supported a canopy of fur; another link with recent Hebridean style. House 8 has no storage boxes or dresser and has been divided into something resembling small cubicles. Fragments of stone, bone and antler were excavated suggesting the house may have been used to make tools such as bone needles or flint axes. The presence of heat-damaged volcanic rocks and what appears to be a flue, support this interpretation. House 8 is distinctive in other ways as well: it is a stand-alone structure not surrounded by midden; instead it is above ground with walls over thick and has a "porch" protecting the entrance. The site provided the earliest known record of the human flea (Pulex irritans) in Europe. The Grooved Ware People who built Skara Brae were primarily pastoralists who raised cattle and sheep. Childe originally believed that the inhabitants did not farm, but excavations in 1972 unearthed seed grains from a midden suggesting that barley was cultivated. Fish bones and shells are common in the middens indicating that dwellers ate seafood. Limpet shells are common and may have been fish-bait that was kept in stone boxes in the homes. The boxes were formed from thin slabs with joints carefully sealed with clay to render them waterproof. This pastoral lifestyle is in sharp contrast to some of the more exotic interpretations of the culture of the Skara Brae people. Euan MacKie suggested that Skara Brae might be the home of a privileged theocratic class of wise men who engaged in astronomical and magical ceremonies at nearby Ring of Brodgar and the Standing Stones of Stenness. Graham and Anna Ritchie cast doubt on this interpretation noting that there is no archaeological evidence for this claim, although a Neolithic "low road" that goes from Skara Brae passes near both these sites and ends at the chambered tomb of Maeshowe. Low roads connect Neolithic ceremonial sites throughout Britain. Dating and abandonment Originally, Childe believed that the settlement dated from around 500 BC. This interpretation was coming under increasing challenge by the time new excavations in 1972–73 settled the question. Radiocarbon results obtained from samples collected during these excavations indicate that occupation of Skara Brae began about 3180 BC with occupation continuing for about six hundred years. Around 2500 BC, after the climate changed, becoming much colder and wetter, the settlement may have been abandoned by its inhabitants. There are many theories as