MAGNETITE IRON DEPOSITS OF SOUTHEASTERN NEW YORK 47 
The Croft mine occupies the northern end of the belt. It is situ- 
ated about 114 miles west of Oscawana Corners, on the eastern flank 
of the ridge overlooking Sprout brook, on the western side of the 
valley. 
The Todd mine is at the southern end of the belt, in Westchester 
county, a little less than 3 miles directly north of Peekskill, and 3 
miles southwest of the Croft mine. It likewise is on the eastern 
flank of a hill overlooking Sprout brook. 
DU MEE BREN STE RUB EET 
The northern end of the Brewster belt begins essentially in the 
city of Brewster, where two mines were formerly operated. One 
was opened in the base of the hill directly west of the railroad sta- 
tion, the other was located just back of the Brewster House. All 
traces of the workings have been removed, and nothing now remains 
to suggest that these mines ever existed. 
The Croton magnetic iron-ore mines comprise the combined work- 
ing of the Theall and the McCollum mines, which are located on the 
opposite sides of a ridge, on what is presumably the same ore body. 
The Theall mine lies about 214 miles southwest of Brewster along 
the Harlem division of the New York Central Railroad, about three- 
eighths of a mile directly west of the track. The mines are on the 
opposite sides of a hill with a connecting tunnel between them, the 
northern opening representing the Theall mine, the McCollum mine 
being on the other side of the hill about one-half of a mile south- 
west. 
Along the same line of strike, at the southern end of the Brewster 
belt, about three-fourths of a mile southwest of the village of Croton 
Falls in Westchester county, is an opening called the Clover Hill 
mine, from which more or less ore has been extracted in the past. 
The mine is situated on the east slope of a hill, about one-fourth of 
a mile west of the highway, on the Butler property. 
E ISOLATED OCCURRENCES IN PUTNAM COUNTY 
Aside from a number of prospect pits and holes not sufficiently 
important to mention, there are two ore bodies in Putnam county 
which do not seem to be connected with the well-defined ore-belts 
just mentioned. One of these is the T7lly Foster ore body, the other 
is the Mahopac. 
The Tilly Foster mine is situated about 2 miles northwest of the 
city of Brewster on a promontory which projects into the lake at 
