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THE ESSEX NATURALIST.
from which we have derived information include "Reports on
the Migration of Birds," by J. A. Harvie-Brown and others, the
"Migration Reports" of the British Ornithologists' Club, Dr.
Eagle Clarke's "Studies in Bird Migration," "The Recovery of
Marked Birds (British Birds Magazine) and "Movements of Ringed
Birds from Abroad to the British Islands and from the British
Islands Abroad," by H. F. Witherby and E. P. Leach. There
are also many minor items which are covered by the bibliography
of my Essex book. The "Reports on the Migration of Birds"
are based on observations made at light-stations round the
British Isles from 1879 to 1887 inclusive, the work having been
carried out under the auspices of the British Association with
the exception of 1879. These reports were presented annually
in the form of a digest under the head of species, but for the
last year, 1887, the details from the schedules were given in full
in calendar form. The digest of the eight years' work, which
was undertaken by Dr. Eagle Clarke, was an almost incredible
task, and as a consequence it was not published until 1896. It
was decided that the condensed published reports should not be
used and that the digest should be based on the details of the
schedules as received from the light-stations. Clarke states that
he had to deal with at least one hundred thousand records taken
from several thousand forms. For this and other ornithological
work Dr. Clarke was the first to receive the great honour of the
Godman-Salvin medal of the British Ornithologists' Union. The
Migration Reports of the British Ornithologists' Club cover a
period from 1905-1913 inclusive. This enquiry was started to
deal with the immigration of the summer-residents, but in the
second year the scope of the investigation was extended to include
among other things information from the light-stations on the
south and east coasts of England. Much valuable information
was accumulated by this enterprise and the form of the presen-
tation of the annual reports was much ahead of the earlier investi-
gation. The details of the schedules from the light-stations were
given in full and as a result much useful Essex information has
been rendered available. It had been the intention of the
Committee to continue the observations for one more year, thus
completing a period of ten years, and then to conclude the
work with a final volume, condensing the whole of the published
matter. The war, however, intervened and the project was not