Mr. Brayley, Jim., on Mock-Basins. 331 



I must trust to Dr. Thomson's candour to excuse the free- 

 dom of these remarks : and I must repeat, that nothing can be 

 further from my intention than to charge him with misrepre- 

 sentation : my only object being to guard his readers against 

 the interpretation which I think would most naturally be put 

 upon his words ; and which would tend to convey a partial and 

 confused view of the case he meant to state. 



Oxford, Oct. 8th, 1830. 



L. On the probable Connection of Mock- Basins, in Form and 

 Situation, toith an internal concretionary Structure in the 

 Mocks on 'which they occur : introduced by Memarks on the 

 alleged Artificial Origin of those Cavities. ByJ^. W. Bray- 

 ley, Jan., A.L.S., Teacher of the Physical Sciences in the 

 Schools of Hazelwood and Bruce Castle.* 



r I^HE basis of the following observations has already re- 

 -*• cently appeared, in a " Selection of Facts," illustrative of 

 the Geology of Devonshire, which has been inserted in the 

 Rev. T. Moore's new " History and Topography" of that 

 county. The main objects, however, of a topographical pub- 

 lication, will necessarily limit the circulation of that work to 

 certain classes of readers ; and many persons who may take an 

 interest in the natural history of Rock-basins, might not ex- 

 pect to find a discussion upon it in the pages of a County 

 History. On these accounts, the author ventures to repub- 

 lish his inquiries on the subject, in the form of a separate 

 memoir, with such corrections and additions as subsequent 

 reflection and reading have suggested. 



Mr. Moore, in a chapter of his work which is allotted to 

 the subject of the original population &c. of Devonshire, has 

 entered at large into the history of Druidism, as having been 

 the religion of the Danmonii ; who were either the aborigines 

 or the early Belgic invaders of the south of Devonshire. In 

 commencing this history, he enters into an examination of 

 the proofs " that the Druids abounded in Devonshire, and 

 were particularly conversant with Dartmoor and its vicinity," 

 which have been conceived to be found in the existence of 

 the Cromlech, Logan-stones, Rock-basins, and similar ob- 

 jects, upon Dartmoor and in the surrounding tract. After 

 some discriminatory observations on the value of the evidence 



* From " Outlines of the Geology, Physical Geography, and Natural 

 History of Devonshire;" inserted in the Rev. T. Moore's " History and 

 Topography of the County of Devon" now publishing : with corrections 

 and additions by the author ; and communicated by him. 



2 U 2 thus 



