1. Geol. Surv. Map: Sheet 27 (Old Series).
2. Geol. Surv. Index Map: Old Series, Sheet 10 ; New Series, Sheet 18.
3. Report on the Geology of Cornwall, Devon and West Somerset;De la Beche;Geol. Survey,1839
4. On the Physical Structure of Devonshire;Sedgwick;Trans. Geol. Soc., Ser. 2,1840
5. On the Carboniferous Slate (or Devonian Rocks) and the Old Red Sandstone of South Ireland and North Devon;Jukes;Quart. Journ. Geol. Soc.,1866