1. On the sarsen stones of Berkshire and Wiltshire;Adams;Geol. Mag.,1873
2. Presidential Address;Barrow;Proc. Geol. Assoc.,1919
3. Buckinghamshire [especially p. 47];Davies;Cambridge County Geographies,1912
4. Byways in British Archaeology;Johnson,1912
5. History of sarsens;Jones;Geol. Mag.,1901