Geological Survey of Great Britain Vertical Sections No. 3. Includes the following: Vertical Section from Werndu Seam of coal to the two feet seam below Big Seam, Cwm Avon by W E Logan; Vertical Section at Brondine, Pont-Yates, Maesant and Yr Hengoed, illustrating the horizontal section No 2 Sheet V by W E Logan. Scale 1 inch: 40 feet.

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Geological mapsD/D An 31

Geological Survey of Great Britain Vertical Sections No. 1. Includes the following: Vertical Section at Moreb, Pembray, Trim Saran, Cil Rhedyn and Mynydd Garreg to the bottom of the Mountain Limestone, Cwm Caer Cefn by W E Logan. Scale 1 inch: 40 feet.D/D An 31/1

Geological Survey of Great Britain Vertical Sections No. 2. Includes the following: Vertical Section of the coal measures at Llwchwr and Penclawdd, Glamorgan by W E Logan. Scale 1 inch: 40 feet.D/D An 31/2

Geological Survey of Great Britain Vertical Sections No. 3. Includes the following: Vertical Section from Werndu Seam of coal to the two feet seam below Big Seam, Cwm Avon by W E Logan; Vertical Section at Brondine, Pont-Yates, Maesant and Yr Hengoed, illustrating the horizontal section No 2 Sheet V by W E Logan. Scale 1 inch: 40 feet.D/D An 31/3

Geological Survey of Great Britain Vertical Sections No. 4. Includes the following: Section of the Lower Coal Measures, North Crop near Llandibie, Carmarthenshire by Sir Henry De le Beche; Section of the Lower Coal Measures, North Crop at Cwm Twrch near Ystradgynlais, Breconshire by Sir Henry De le Beche; Fforestfach Lvel Cwm Gwendraeth by W E Logan; Section of the coal measures at Llansamlet near Swansea by W E Logan; Section of the coal measures at Bryncoch Dyffryn, Neath, Glamorgan by W E Logan. Scale 1 inch: 40 feet.D/D An 31/4

Geological Survey of Great Britain Vertical Sections No. 7. Includes the following: Section across the coalfield of South Wales from the Mountain Limestone near Mynydd Garreg by Pembray to the Mountain Limestone near Spritsail Tor, Llanmadoc, Gower; Section on the North Crop of the South Welsh Coalfield from Brondyne Hill by Pont Yates to the Mountain Limestone near Yr Hen Goed, Carmarthenshire. Scale 1 inch: 1000 feet.D/D An 31/5

Geological Survey of Great Britain Vertical Sections No. 9. Includes the following: Section across a portion of the South Welsh Coalfield from Craig and Cefn Drim by Mynydd Carn Goch and Cline Wood to the Mountain Limestone at Caswell Bay, Gower; Section from Cilfay Hill, Swansea to Castell Craig Cennen on the North Crop of the Mountain Limestone. Scale 1 inch: 1000 feet.D/D An 31/6