OF NORFOLK AND SUFFOLK. IOg 
however, the relation of the Crag and of the “ Diluvium ” of 
the coast between Cromer and Yarmouth to the underlying 
Chalk had been correctly shown, but no attempt had been 
made to map the glacial deposits over an extended area, 
either in Norfolk, or as far as I know, in any other part 
of the world. 
Wood saw clearly, not only that no real progress was possible 
until this was done, but that the glacial drifts of the East of 
England could only be studied satisfactorily as a whole. 
He consequently set before himself the gigantic task of 
a detailed survey of these deposits, on the inch scale, from 
the Humber to the valley of the Thames, and from the 
Midland Counties to the Suffolk coast. Although, alas, his 
premature death prevented its full accomplishment, he was 
able, with the help of one or two younger men who were 
proud to work under him, to complete a great portion of it. 
The district he allotted to me was the county of Norfolk 
and the northern portion of Suffolk, in the mapping of which 
I spent the leisure of eight or ten years. 
By 1868, when the British Association for the Advancement 
of Science met in Norwich, the work w r as sufficiently advanced 
to justify the publication of a preliminary statement of our 
results,* and the exhibition of a geological map on the 
1 inch scale, which, drawn by Wood’s own hand, showed with 
more or less accuracy the distribution of the glacial beds 
over an area of 2,000 square miles. The greater part of it 
appeared afterwards in a reduced form, and with a few 
corrections, in the volume of the Palaeontographical Society 
for 18724 
Although the issue of further instalments was arrested by 
his failing health, Wood was able to show in a sketch map, 
published in 1880, four years before his death, the limits 
of the region covered by the Chalky-boulder clay. This, 
for purposes of reference, is given in fig. 4, p. 116 of the 
present paper. 
* Rep. Brit. Assoc. (1868), p. 80. 
f Copies of this map, the first of its kind ever published, have lately 
been placed in the Museums at Norwich and. Ipswich. 
