fire was built during the Flavian dynasty. Further wall trenches were dug through the remains of this building, and they indicate the presence of a later building 8.5m long and 6.75m wide with a passageway on the eastern side. Two drains aligned on the northwest-southeast axis cut through this building. The occupation of this site occurred during 70 to 120 AD, with a period of abandonment around 100 AD. Recent exploration In November 2005, Trawscoed fort was explored using fluxgate gradiometer surveys by David Hopewell. The researchers surveyed a rectangle of by , including the northern quadrant of the fort and the areas east and north of the fort. They collected the data by dividing this rectangle up into by square plots. They then surveyed each plot by walking along the length of the plot, taking readings every . Each scanned strip was apart, giving a total of 800 readings per plot. The researchers then took this data and used Geoplot 3.0 software to generate X-Y waterfall plots and greyscale maps of the region. The waterfall plots were made by plotting each traversal of a plot on a trace, which enabled anomalies to be easily seen. Interpretation of the results High readings in the magnetic map were caused by pieces of iron and fences. Any locations where fire was, such as kilns and burning wooden structures, also increased the amount of magnetic response. The results David Hopewell reports that "The northern corner of the fort shows up clearly on the grey-scale plot", and sections of the ramparts showed evidence of burning. He found a ditch which circumscribed the fort just outside the walls. Just outside the ditch is a wide swathe of ground containing very little magnetic response. To the northeast of this area he found a large, strong magnetic response which indicates that a bank once existed in this area. In the northern and eastern quadrants of the fort were blocks of six barracks each. Hopewell also scanned some of the area around the fort, and he wrote that there was a road leading to the northeast gate. He recorded finding small anomalies on either side of the gate, which may indicate the presence of what was once a guard tower. Large areas of indications of burning imply that there may have been buildings that had burned down. The rest of the area to the northeast contains faint parallel