A ruinous brick and mortared stone constructed building. It measures 7.32m long at the western elevation (facing the transmitter buildings below) by 4.42m wide. There are two sections of double-thickness wall remaining and standing up to 1m high by 0.3m wide. This was a military guarding blockhouse assigned as number 9 of ten such blockhouses. Before being ruined, it would likely have had, as other blockhouses did, a second floor believed to be rudimentary accommodation/sleeping quarters. There is no current direct evidence of firing holes for this specific blockhouse but are almost certain to have been present as evidence for them does remain at eight of the ten blockhouses.

Source: Rowlands, J., Marconi's Carnarvon Station 1912-1939: a journey into early commercial wireless in north Wales' Second Edition, 2023. Dimensions updated by J. and R. Rowlands, April 2023.

RCAHMW, 2023.