254 ON THE DETRITAL TIN-ORE OF CORNWALL. 
field ;* to some I am more deeply indebted than to others ; 
but I fear to particularize, lest—by unintentional omissions—I 
may pain some to whom I am under the deepest obligations. 
W. J. HENWOOD. 
8, CLARENCE PLACE, PENZANCE, 
1871—1873. 
CORRECTION. 
Page 199, line 8....fo7 Marazion-march 7¢ad Marazion-marsh. 
Henwood, Cornwall Geol: Trans: v, pp. 8, 386; viii, p. 722. 
