A small cross-slab which measures 8.3 centimetres by 3.5 centimetres by 1.3 centimetres and is kept in the Manx Museum.  It was found at the apparent site of an early medieval keeill or chapel (PRN 0600.00), which would have been in use during the period circa AD500-AD1000.  Lintel graves were found at Folieu in 1905 when digging drains for a new house at Port-y-Vullen, close to the brooghs, in the field numbered as Plot 388 on the 1870 1:2500 scale Ordnance Survey map. These were thought to be Christian graves marking the site of a keeill of which no other traces remain.