Turret 79B (Jeffrey Croft) (grid reference NY22836256) is situated about 250 metres southeast of the houses at the east end of Bowness-on-Solway in the field known as Jeffrey Croft.[1] Its site is indicated by a very slight platform, visible on the ground.[1] It was partially excavated in 1934.[6] The excavations found the south and west walls of the turret.[6] It was originally built as a free-standing stone tower abutting the Turf Wall.[1] It is the most westerly turret known on Hadrian's Wall.[1]