What river is the castle that a stone was taken from to build the L-plan tower for Barscobe Castle on?
Threave Castle Threave Castle is situated on an island in the River Dee, 2.5 km west of Castle Douglas in Dumfries and Galloway, south-west Scotland.
Glastonbury Canal (medieval) The medieval Glastonbury canal was built in about the middle of the 10th century to link the River Brue at Northover ( ) with Glastonbury Abbey, a distance of about 1.75 km . Its initial purpose is believed to be the transport of building stone for the abbey, but later it was used for delivering produce, including grain, wine and fish, from the abbey's outlying properties. It remained in use until at least the 14th century, but possibly as late as the mid-16th century. English Heritage assess the canal remains, based on a "provisional" interpretation, as a site of "national importance".