1. Mineral analyses of some Ordovician rocks from Caernarvonshire;Bilunghurst;Geol. Mag.,1929
2. Boswell , P. G. H. 1949 The Middle Silurian rocks of North Wales
3. The petrography of the Triassic rocks of the Vale of Clwyd;Double;Proc. Liverpool Geol. Soc.,1927
4. The petrology of Triassic boulders from the Boulder Clay of Anglesey;Double;Ibid,1928
5. The Geology of Anglesey;Greenly;Geol. Surv. Mem.,1919