Sketch of Henry Carvill Lewis — Upham. 373 
the diamond and to the Archaean rocks,not less than those pertain- 
ing to the glacial drift which are reviewed in this article, clearly 
illustrate his spirit of earnest and independent thought, embod- 
ied in his chosen motto for work. "Truth for authority, not 
authority for truth." 
He had a firm Christian faith — the form of worship to which he 
was attached being the Episcopal. With fine mental and phy- 
sical powers, a wide range of scholarship, a happy, genial and 
enthusiastic temperament, rare perseverance and industry, and a 
lofty devotion to the interest not only of science but of man- 
kind, his life seemed to promise the widest usefulness and honor. 
Upon his grave in Walmsley church-yard at Bolton, near Man- 
chester, a design in flowers from a friend told the ruling ele- 
ment of his character: "He loved the truth." Besides the 
keen grief of kindred and intimate friends, the geologists of two 
continents mourn the loss of a most gifted and faithful fellow- 
worker, who indeed already had achieved a grand life-work in the 
few 3'ears allotted to him. He was a member of the American 
and British Associations; of the American Philosophical Society, 
the Academy of Natural Sciences, and the Franklin Insti- 
tute.in Philadelphia; of the Geological Society of Liverpool; and a 
fellow of the Geological Societies of London and Germany. 
Professor Lewis first became specially interested in the glacial 
drift and its terminal moraine during the latter part of the jeax 
1880, when in company with Prof. G. F. Wright he i-tudied the 
remarkable osars of Andover, Mass., the gravel of Trenton, N. 
J., containing palaeolithic implements, the drift deposits of the 
vicinity of New Haven, Conn., under the guidance of professor 
Dana, and finally the terminal moraine in eastern Pennsylvania 
between the Delaware and Lehigh rivers. The following year 
professors Lewis anc) W^ right traversed together the southern 
border of the drift through Pennsylvania from Belvidere on the 
Delaware west-north-westerly more than 200 miles across the 
ridges of the AUeghenies to Little Valley near Salamanca, N. 
Y., and thence south-westerly 130 miles to the line dividing 
Pennsylvania and Ohio, which it crosses about fifteen miles 
north of the Ohio river. The report of this survey of the 
terminal moraine was published in 1884, forming volume Z of 
the reports of progress of the Second Geological Survey of 
Pennsylvania, 
