218 TRANSACTIONS OF THE [May 2], 
latter often result. The anorthosites occur chiefly in the north- 
ern part of Willsboro’. The rock of Boquet mountain and the 
other western hills is of the decomposed gneissic gabbro variety ; 
while in southern Essex, adjoining the Westport iron belt, in- 
clusions of magnetite are abundant, as are brilliant reaction 
rims of olivine and garnet.* An unusually fresh exposure 
occurs in the railroad cut, north of the river bend at the West- 
port boundary. 
Reaction rims about the garnets are frequently observed 
under the microscope, as in figure 1, which shows a garnet with 
kelyphite rim in the anorthosite wall of a trap dike from Wills- 
boro’ Bay. The garnet itself contains minute needles that ex- 
tinguish at a high angle. 
The crystalline limestone in both the above-meutioned local- 
ities tends to a pure white calcite, carrying graphite. On 
Willsboro’ Bay it forms a broad band through which the 
tunnel runs. On the lakeside at the southern margin of this 
limestone bed there is a deep cleft about 2 feet wide, running far 
in with astrike of N. 80° W. The walls are thickly studded with 
calcite crystals half an inch or more in diameter, showing the 
prism o P terminated by $} R. The rock taken from far up the 
face of the cliff when the cut was blasted is said to have yielded 
galena, arsenopyrite and pyrite; but the place is now inacces- 
sible. In connection with these minerals it is interesting to note 
an allusion by Prof. W. C. Watson} to a map procured from 
England by Elkanah Watson in 1784 and since lost, which was 
made from surveys by French and English engineers. Upon 
thisa point is designated in the mountain range between Ches- 
terfield and Willsboro’ as “ Lead ore bed.”’t 
“A traditional legend of this ore bed is known to exist among 
the savage tribes north of the great lakes. A little flotilla of 
canoes, bearing Indians from that region, appears yearly, about 
autumn, lying on the beach in the vicinity of these mountains.” 
The same writer adds, in the report for 1853 (pp. 718-719), that 
“Within a few years strange Indians have been seen frequently 
prowling about these mountains with large quantities of crude 
* Reaction rims are figured by J. F. Kemp. Bull. Geol, Soe. Amer. V. 213-224 
(1894),and W. D. Marruew: The Intrusive Rocks near St. John. N w Bruns- 
wick, Trans. N. Y. Acad. Sci. XIIL.: 185-203, (1894), See aso F. D. Apams, 
Am. Nat. Nov., 1885, p. 1087. 
+W. ©. Watson: Geology of Essex Co., N. Y.: Trans. N. Y. State Agricultural 
Soc. IX. (1849), 787. 
{I find two earlier maps mentioning the locality. The map to accompany 
Peter Kalm’s Travelsin North America, trinslated into Engiish by J. R. Forster, 
London, 1776, Part ILI., has ‘‘ Lead Mine” printed between the mouth of the 
Boquet and Willsboro’ Bay;and Gen. Wm. Tryon’'s “Chirographical Map of the 
Province of New York,’ London. 1779, included in the Documentary History 
of the State of New York, by E. B. O'Callaghan, Vol. I., Albany, 1819, locates 
‘“‘Lead Mine” north of the brook flowing nto Willsboro’ Bay. 
