Triangulation Pillar S3901: Aylesbeare Common 

Location
Grid reference: SY 05505 90013.
Landranger 192: Exeter & Sidmouth, Exmouth & Teignmouth.
Waypoint: TP0945.
Neighbouring Triangulation Pillars
| S3754 | Woodbury Common 2.51km to the southwest. |
| S5507 | Rockbeare Hill New 4.41km to the north. |
| S3902 | Rockbeare Hill 4.63km to the north. |
| S3766 | Lympstone Common 5.41km to the southwest. |
| S3925 | Harpford Common 5.72km to the east. |
Third Geodetic Levelling, England & Wales (1950-68)
This triangulation pillar was used during the Third geodetic levelling, England & Wales. It was included on the Beer to Bridford levelling line. The surveyor's description was S face of Aylesbeare Common Trig Pillar.