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 greatly extended. 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 §5 "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. Rev. A. W. Rowe, "On the rocks of the Essex Drift"
Q.J.G.S., xliii. p. 351. See also by same author "Some
Essex Boulders." Essex Nat. Vol. i, pp. 61, 117.
1858. Report of British Association, Bath, pp. 114-121.
1859. W. Whitaker, Memoir of the Geological Survey Sheets, 1,
2 and 7.
1893. Rev. H. T. Armfield, M.A., late Rector 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.