XX 
INTRODUCTION'. 
ings, has exhibited not only distinguished talent and judgment, but 
a patient and vigilant attention peculiarly valuable to one whose leisure 
hours are so few as mine. 
To the numerous friends of geological science who have subscribed 
for the publication of this Work, unfeigned thanks are due : the per- 
sonal favour conferred on the Author he gratefully acknowledges ; but a 
higher feeling is involved in the spontaneous patronage which has been 
conferred on this record of his exertions, by individuals not specially 
interested in the results. These disinterested promoters of science 
know that without such aid and sympathy many costly works would 
never have appeared ; many of the discoveries of the present age would 
be unknown to the next ; and the progress of knowledge would be 
fatally retarded. 
The noble aspiration of Wordsworth — 
Enough, if something from our hands have power 
To live, and act, and serve the future hour, — 
is peculiarly applicable to the labours of men of science ; and it is with a 
full sense of the importance of the trust which has been reposed in him 
for this object, that the Author of the Illustrations of the Geology of 
Yorkshire delivers the conclusion of his Work. 
Yoek, March 1, 1836. 
