20
The East Anglian Earthquake.
accompanied me on the tour of inspection and gave me the
benefit of his experience in the field. I am also indebted for
assistance to Messrs. W. Topley, W. Whitaker, and G. H.
Kinahan, all of the Geological Survey. To Prof. J. P.
O'Reilly, of the Royal College of Science for Ireland, I am
indebted for a number of his memoirs and papers bearing on
certain geological aspects of the direction of earthquake
movement. For much valuable advice respecting the dyna-
mical principles of seismology I beg to acknowledge my
indebtedness to the published writings, as also to several
private communications from Prof. J. A. Ewing, of the
University of Dundee, formerly President of the Seismo-
logical Society of Japan, and one of our first authorities on
earthquake measurement. From Prof. John Milne, F.G.S.,
of Tokio, Secretary of the Seismological Society of Japan, I
have also received copies of many of his papers, which have
been of the greatest value in the preparation of the present
Report.
Free use has been made of the reports in the local and
metropolitan newspapers, and I am glad to be able to bear
witness to the general accuracy and excellence of the
accounts, which were published with an alacrity that cer-
tainly does credit to modern journalism.6 The information
supplied by the correspondents of ' Nature,' has also been
made use of with due acknowledgment. Of special reports
issued by local societies, I have only met with one which in
any way attempts to give an account of the general effects
experienced throughout the county over which the Society
extends its operations—I refer to Mr. C. A. Markham's
paper, which appears in No. 19 of the ' Journal of the
Northamptonshire Natural History Society and Field Club,'
published in August, 1884. This absence of record on the
part of the local societies is certainly to be deplored, as
accurate observations from those counties contiguous to our
5 A special edition of the ' Essex Telegraph ' was issued on the evening
of April 22nd, and all the accounts and letters which appeared in that
paper were afterwards reprinted and issued in the form of a small
pamphlet by the publisher, Mr. P. Wright, of Head Street, Colchester.