Matrician Bench of Ordnance Surveyists

The Matrician Bench fo Ordnance Surveyists was an organization on Gallifrey that monitored the position of various Time Lord Houses. K9 reported to Leela that according to this body, the House of Lungbarrow no longer stood on the side of Mount Lung in the Southern Mountains and that it had vanished without a trace. (NA: Lungbarrow)