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Pachyderms and Man, opposed, as this opinion is, to the general 
voice of geologists. Much more numerous facts, critically 
observed, and divested of all possibility of error, must be ac- 
cumulated before our own, or a more general, assent should be 
given. Nevertheless, I have thought it right not to withhold 
such facts as have come within my reach. This is done in the 
hope of directing attention to the subject, and of shewing the 
importance of the most rigid notice of similar facts in future. 
Each should hereafter be noted on the spot, and every circum- 
stance that can give value to the observation truthfully 
recorded. Before concluding, I would urge those who may 
be engaged in such inquiries, not to be discouraged by the 
united voice of geologists. A gentleman, more conversant 
with the geology of Yorkshire than any other person, 
has published within the last four years a statement 
that the Yorkshire deposits of post-glacial date, are 
characterized by the absence of the large Pachyderms.* 
This statement we have proved to be unfounded, by the 
discovery of the Hippopotamus and Mammoth in this district, 
in a deposit which the learned and excellent Professor him- 
self, at the late meeting of the British Association at Hull, 
admitted to be of post-glacial date. Such being the case, I 
may not be considered presumptuous in saying that it will 
not cause me much surprise to find both the geologist and 
the antiquary some day admitting that the great northern 
Pachyderms have been co-eval with man. 
In connection with this paper, Mr. Denny read the 
following brief notice of an instrument supposed to have 
been a Leister, lately presented to the Museum of the 
Leeds Philosophical and Literary Society, by Thomas 
Newsome, Esq. : — 
In 1851, when excavating for the terminus of the 
* Rivers, Mountains, and Sea Coasts of Yorkshire, by John Phillips, 1853, p. 187. 
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