SARSEN, BASALT AND OTHER BOULDERS IN ESSEX 187 
county, and lead eventually to the publication of a map showing 
the general distribution of the various kinds of boulders. 
Owing to the kind help of Mr. Miller Christy, Mr. Percy Thomp¬ 
son, Mr. Guy Maynard, Mr. A. G. Wright and others, my own 
list has been greatlyextended. My best thanks are due to them. 
A knowledge of the character and general distribution of 
the boulders in the county would, I think, be interesting from 
both an antiquarian and a geological point of view. 
The authority for the occurrence of a Boulder is indicated 
by the initial letter of the observer, thus Salter—[S.]. 
The following papers, etc., might be consulted by those who 
wish to become better acquainted with the subject 
1835. J. Brown, “ A synoptical table of some of the mineral sub¬ 
stances and of the organic remains found in the Gravel at 
Stanway, Essex, and the neighbouring localities within a 
radius of 15 miles.” Mag. Nat. Hist., Vol. vi., ii., p. 349, 
article 9. 
1837. J. Brown, “ Observations upon the boulders of Trap rock, 
etc., which occur in the diluvium of Essex,” Mag. Nat. 
Hist. (Charlesworth’s) vol. i. {new series) p. 146. 
1854. J. Prestwich, “ The Woolwich and Reading Series,” 
Q-J.G .S., vol. x., p. 123 §3 “ Druid Sandstones.” 
1864. W. Whitaker, Memoir of the Geological Survey Sheet 7, pp. 
71, 72, “ Greywethers and Puddingstones.” 
1886. Prof. T. Rupert Jones, “ History of the Sarsens.” The 
Wiltshire Arch, and Nat. Hist. Soc. Mag. Vol. xxiii. pp. 122- 
154 - 
1887. Revo A. W. Rowe, " On the rocks of the Essex Drift ” 
QJ-G . 5 ., xliii. p. 351. See also by same author “ Some 
Essex Boulders.” Essex Nat. Vol. i, pp. 61, 117. 
1888. Report of British Association, Bath, pp. 114-121. 
1889. W. Whitaker, Memoir of the Geological Survey Sheets, 1, 
2 and 7. 
1893. Rev. H. T. Armfield, M.A., late R.ector of Colne Engaine, 
“ On some ancient Boulders scattered in the district of the 
Colnes.” Trans, of the Essex Archaeological Society, Vol. 
iv. {new series) pp. 61-69. 
1900. The Rev. A. Irving, B.A., D.Sc. Proc. Geological Asso¬ 
ciation, Vol. xv. pp. 196 and 236 ; cf. also Vol. xiv. p. 395. 
1901. Prof. J. W. Judd, Notes on the Structure of Sarsens,” 
Geological Magazine, 1901, p. i 
1901. Prof. T. Rupert Jones, “ History of the Sarsens,” Geological 
Magazine, 1901, pp. 54 and 115, where an extensive biblio¬ 
graphy can be seen. 
1903. F. W. Harmer and P. Kendal, B.A. Report {Southport), 
p. 238. 
